The Efficacy of Manual Therapy and Exercise
for Different Stages of Non-specific Low Back
Pain: An Update of Systematic Reviews

This section is compiled by Frank M. Painter, D.C.
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FROM:   J Man Manip Ther. 2014 (May); 22 (2): 59–74 ~ FULL TEXT


Benjamin Hidalgo, Christine Detrembleur, Toby Hall,
Philippe Mahaudens, and Henri Nielens

Institute of Neuroscience,
Faculty of Motor Sciences,
University of Louvain,
Brussels, Belgium

OBJECTIVE:   to review and update the evidence for different forms of manual therapy (MT) for patients with different stages of non-specific low back pain (LBP).

DATA SOURCES:   MEDLINE, Cochrane-Register-of-Controlled-Trials, PEDro, EMBASE.

METHOD:   A systematic review of MT with a literature search covering the period of January 2000 to April 2013 was conducted by two independent reviewers according to Cochrane and PRISMA guidelines. A total of 360 studies were evaluated using qualitative criteria. Two stages of LBP were categorized; combined acute-subacute and chronic. Further sub-classification was made according to MT intervention:

MT1   (manipulation)
MT2   (mobilization and soft-tissue-techniques) and
MT3   (MT1 combined with MT2).

In each sub-category, MT could be combined or not with exercise or usual medical care (UMC). Consequently, quantitative evaluation criteria were applied to 56 eligible randomized controlled trials (RCTs), and hence 23 low-risk of bias RCTs were identified for review. Only studies providing new updated information (11/23 RCTs) are presented here.


Acute-subacute LBP:

STRONG –   evidence in favour of MT1 (manipulation) when compared to sham for pain, function and health improvements in the short-term (1-3 months).

MODERATE –   evidence to support MT1 (manipulation) and MT3 (MT1 combined with MT2) combined with usual medical care (UMC) in comparison to UMC alone for pain, function and health improvements in the short-term.

Chronic LBP:

MODERATE to STRONG –   evidence in favour of MT1 (manipulation) in comparison to sham for pain, function and overall-health in the short-term.

MODERATE –   evidence in favour of MT3 (MT1 combined with MT2) combined with exercise or usual medical care (UMC) in comparison to exercise and back-school was established for pain, function and quality-of-life in the short and long-term.

LIMITED –   evidence in favour of MT2 (mobilization and soft-tissue-techniques) combined with exercise and usual medical care (UMC) in comparison to UMC alone for pain and function from short to long-term.

LIMITED –   evidence of no effect for MT1 (manipulation) with extension-exercise compared to extension-exercise alone for pain in the short to long-term.

CONCLUSION:   This systematic review updates the evidence for manual therapy (MT) with exercise or usual medical care (UMC) for different stages of LBP and provides recommendations for future studies.

KEYWORDS:   Efficacy; Manual therapy; Non-specific low back pain; Randomized controlled trials; Spinal manipulation

From the FULL TEXT Article:


After headaches and chronic fatigue, low back pain (LBP) is the most reported complaint, with more than 80% of the population reporting LBP at some point in their life. [1, 2] In developed countries, LBP has enormous and growing indirect and direct costs for society and public health organizations. [3, 4]

The majority of LBP cases are described as non-specific as there is no identifiable pathology on radiological imaging. [2] Indeed there is a poor correlation between findings on radiological imaging and symptoms, with a radiological diagnosis identified in only 15% of cases. [5–9] Hence, LBP is often a symptom of unknown origin and etiology. [2, 5, 10, 11]

Many factors have been identified as possible causes or contributing factors to LBP. For example nociceptive inputs, particularly in acute–subacute conditions from various spine structures can cause pain, including zygapophysial joints, intervertebral discs and sacro-iliac joints. [5, 12–14] In chronic LBP, psychosocial factors are of prime importance in explaining the prolongation of pain. [2, 15, 16] Additional factors linked to chronic LBP include obesity and physical deconditioning associated with sedentary lifestyles. [2, 17] Moreover, genetic factors have been strongly linked to LBP through their influence on pain perception and psychosocial factors. [2, 18]

In general terms, in the case of acute LBP, reports suggest that 75–90% of cases recover within 6 weeks irrespective of medical intervention, whereas up to 25% are at risk of developing chronic pain and disability. [1, 2] Indeed, many individuals with LBP have a number of persisting or recurring symptoms. [1, 5, 8, 19] Chronic LBP therefore represents a considerable challenge because recovery is unlikely to occur, despite considerable medical advances. [20]

In physical therapy practice, various forms of manual therapy (MT) are currently used to manage LBP. [7, 21–23] Manual therapists use a range of treatment approaches including various passive techniques such as mobilization and manipulation as well as a variety of different forms of exercise. The use of these approaches, along with clinical reasoning based on the bio-psycho-social model, represents the essence of MT ( [24]

This systematic review (SR) focuses on the effects of commonly used MT approaches identified through a comprehensive evidence based search strategy of low-risk of bias clinical trials. Three categories of passive MT techniques are defined; MT1 (lumbopelvic manipulation: high-velocity-low-amplitude thrust) MT2 (non-thrust lumbo-pelvic mobilization and soft-tissue techniques), [25–27] and MT3 (combination of MT1 and MT2). We also considered passive MT techniques (MT1–3) combined or not with exercise (specific or general) or combined with usual medical care (UMC) (stay active, reassurance, education and medication). [11, 27, 28]

The popularity and use of MT for the management of LBP has grown, in part supported by the inclusion of MT in various clinical practice guidelines. [5, 10, 23, 29] This is despite uncertainty regarding the levels of evidence for the effectiveness of different approaches in MT at different stages of LBP. [5, 7, 10, 22, 29–36]

Previous SRs have reported that in general terms, MT is considered better than a placebo treatment or no treatment at all for LBP. [7, 30, 35–40] These reviews failed to establish levels of evidence for other forms of treatment such as UMC or exercise in comparison to MT. [35, 37, 39, 40] In addition, previous SRs have not investigated which MT approaches (MT1–3), when combined with UMC or exercise, are more effective for LBP. The present SR updates previous reviews, and is the first to focus specifically on different MT approaches for different stages of LBP. New findings, as well as new evidence to inform findings from previous systematic reviews, [41–45] are presented.


This SR was conducted in accordance with the PRISMA and Cochrane-Collaboration-Back-Review-Group (CCBRG) updated guidelines for SR. [46, 47]

      Search strategy

A literature search of randomized controlled trials (RCTs) published in English between 2000 and 2013, on the efficacy of MT in the treatment of LBP was conducted independently by two reviewers in four electronic databases: MEDLINE, Cochrane-Register-of-Controlled-Trials, PEDro, and EMBASE. The detailed search strategy in MEDLINE is presented in Appendix 1, and was adapted to search in the three other databases.

Figure 1

Based on information revealed in the titles and abstracts, a first selection of articles was performed using the inclusion criteria described below. A final selection was conducted after a blinded critical appraisal of the quality of the studies. A consensus was reached at each step (Fig. 1) on the studies to be included. In cases of disagreement, a third reviewer made the necessary decision.

      Inclusion criteria

Study design   RCTs from the period of January 2000 to April 2013 were included only if

(i)   they presented a low-risk of bias,

(ii)   if LBP cases treated with MT were compared to a randomized control group receiving either no treatment, a placebo procedure, or another effective therapy for LBP and

(iii)   if the randomization methods were appropriate and clearly reported, with moreover

(iv)   a single (assessors blinded) or quasi-double-blind design (assessors and patients blinded).

Patients   LBP is distinguished on the basis of the duration of the pain episode: acute (<6 weeks), subacute (6–12 weeks) and chronic (>12 weeks). [2, 29] However, this distinction may not be satisfactory and it has been argued that categorization should be on the basis of other factors including location, symptoms, duration, frequency, and severity. [48] In this SR, we used a combination of duration, location and symptoms to specify the study population:

  • Studies were included if subjects were males and females aged between 18 and 60 years suffering from acute–subacute (0–12 weeks) or chronic (>12 weeks) LBP. Acute and subacute categories were combined because of their similarities in contrast to chronic LBP category, where psycho-social factors appear more important. [16, 49, 50]

  • LBP is defined as pain in the lower back between the lowest ribs and inferior gluteal folds. [46, 51] Given that people with LBP may present with radicular pain, LBP is defined according to the following Quebec-Task-Force (QTF) classification:

    (1)   LBP alone (QTF 1),

    (2)   LBP with radiating pain into the thigh but not below the knee (QTF 2),

    (3)   LBP with nerve root pain without neurologic deficit (QTF 3), or

    (4)   LBP with nerve root pain with neurologic deficit (QTF 4).52

    In the present SR, only trials that contained patients in classes QTF 1–3 were included.

Interventions   Among the included trials, we considered three categories of the most common MT techniques represented in the intervention groups. MT1 comprised high-velocity-low-amplitude thrust of the lumbo-pelvic region with ‘cavitation’. [7, 21, 22, 27, 37, 53] MT2 comprised mobilization and soft-tissue-techniques including ‘myofascial’, ‘myotensive’ or ‘harmonic’ techniques on the lumbo-pelvic region. [22, 27, 37, 54] MT3 comprised the combination of MT1 and MT2. Furthermore, sub-categorization of groups MT1–3 was based on the addition or not of exercises either specific (for example based on directional preference, stabilization, and motor control) or general (for example global strengthening, cardiovascular endurance, stretching and range-of-motion exercises) or UMC. [1, 21, 32, 55]

      Control groups

The control groups received no treatment, placebo, UMC, or exercise.

      Outcome measures of effectiveness

Table 1

The outcome measures were classified according to the CCBRG recommendations: pain, function, overall-health and quality of life (Table 1). Timing of the follow-up measurements was defined as very-short-term (end of treatment/discharge to 1 month), short-term (1–3 months), intermediate-term (3 months–1 year), or long-term (1 year or more). [46, 47, 51]

      Quality assessment

Two independent reviewers assessed the risk of bias, methodological quality, data-extraction and clinical relevance of each trial.

Quantitative and qualitative criteria were assessed by applying the CCBRG criteria. [46, 47] Quantitative risk of bias was assessed using an 11-point check-list (see Appendix 1). [47]

Qualitative criteria were: a clear distinction and separation between combined acute–subacute and chronic LBP categories at baseline; a detailed description of the MT intervention allowing the reviewers to classify the MT techniques according to MT1–MT3 classification system; and a single-blind (assessors blinded) or quasi-double-blind (assessors and patients blinded) design.

Table 2

Table 3

Table 4

We considered as ‘high-quality’ those RCTs with quasi-double-blind designs that met at least 9/11 of the CCBRG criteria. ‘Low-quality’ RCTs status was assigned to studies of single-blind design with a minimum score of 7/11 (Tables 2 and 3). The dichotomy of classification into ‘high’ or ‘low’ qualities study is required when using the system of CCBRG to determine the strength of evidence (Table 1) and must be clearly described. To reduce the number of studies included in this SR, only studies that present new findings or update previous SR are described. Moreover similarly to another SR, [56] to facilitate clarity of presentation, RCTs were only included if they were of low-risk of bias, and either high quality (indicated by a ‘A’) or moderate quality (indicated by a ‘B’).

      Strength of evidence and clinical relevance

Strength of evidence was determined by grouping similar ‘Patients Interventions Comparisons Outcomes Study design’ to provide an overall level of evidence (Table 1) on the efficacy of the MT techniques (Table 4). Based on CCBRG guidelines, [47, 51] the effect sizes were independently collected or calculated by two authors, and used to assess the clinical relevance of MT interventions on outcome measures. We report the between groups means of difference (MD = mean A–mean B) or Cohen’s standardized means of difference (SMD = mean A–mean B/mean SD). In this SR, the clinical relevance was determined by two conditions and scored by ‘YES’ in favour of the intervention group; if there were

(i)   significant difference between groups (P<0.05) associated

(ii)   with between groups effect sizes equal or superior to the minimal clinically important difference (MD) or moderate to large effect (SMD) on specific outcome measure (Tables 2 and 3).


Two reviewers performed the initial selection of articles based on keywords. Upon discussion, the reviewers achieved consensus on inclusion of 56 trials that met the selection criteria based on their titles and abstracts. After critical appraisal of these 56 studies, 23 RCTs were retained (Fig. 1). Only 11/23 of these RCTs were found to have new evidence or updated previous SRs and are fully presented here. Appendix 2 and Table 4 present a summary of the remaining 12 RCTs that are not detailed in this results section.

The studies’ characteristics and effect sizes on outcome measures are presented for acute–subacute (Table 2) and chronic LBP (Table 3). A qualitative SR was undertaken on the 11 low-risk of bias RCTs, five studies were classified as level A quality, and six as level B quality.

      Effects of interventions on acute and subacute LBP

MT versus sham-MT   Santilli et al., [57] Hoiriis et al., [58] and von Heymann et al. [59] (studies rated as level A quality) assessed the effects of MT1 in comparison to sham-MT1 in patients with acute LBP. Santilli et al. [57] compared lumbo-pelvic rotational manipulation toward the pain-free direction to simulated manipulation not following any specific pattern and not involving rapid thrust. The frequency of treatment was 5 days per week until pain relief occurred or up to a maximum of 20 sessions of 5 minutes. For LBP up to 3 months, MT1 was more effective in decreasing local pain, radiating pain, and the duration of pain with clinical relevance (P<0.0001 and mean of difference of 1.8). No statistically significant differences were found for overall-health improvement and psychosocial outcomes. At 6 months, the percentage of pain-free patients was significantly higher in the MT1 group with mean difference of 22% for local pain (P<0.005) and of 35% for radiating pain (P<0.001). Two patients, one in MT1 and one in sham-MT1, were dissatisfied with treatment and stopped.

Hoiriis et al.58 investigated the effects of lumbo-pelvic manipulation in prone or side-lying position combined with a drug placebo, in comparison to sham-MT1 combined with a muscle relaxant or with a drug placebo. Sham-MT1 consisted of manual light pressure on the lumbar spine in both positions (prone and side-lying). All groups received eight visits over 2 weeks and showed significant improvements in pain relief and disability (P<0.0001) and depression scores (P<0.0001). Clinically relevant differences between groups could only be identified in favour of the intervention group for pain relief in the very short term with P<0.05 and standardized mean difference of 0.70. However, further evaluation revealed that the perception of true MT was significantly higher (P<0.05) in the intervention group than in either of the two control groups. Indeed, the sham maneuver did not closely approximate the manipulation technique.

von Heymann et al. [59] explored the efficacy of lumbo-pelvic rotational manipulation in side-lying position and placebo-diclofenac in comparison to Sham-MT1 with diclofenac or placebo-diclofenac. Sham MT1 was performed using real manipulation in a prone position but at the incorrect location (i.e. on a non-dysfunctional sacro-iliac-joint) to mimic as closely as possible the intervention being tested. This sham procedure is not supposed to have any influence on the lumbar dysfunction and is not believed to harm the patient. All groups received 2–3 visits over a 1 week period. There was a clear and clinically relevant difference at very-short-term follow up (9 days) between the groups (P = 0.013), the intervention group showed a standardized mean difference of 0.60 on functional improvement with similar result for pain and quality of life. No adverse effects or harm were reported in this study. These results suggested that real MT1 had clinically superior effects than NSAID and placebo interventions.

MT with UMC versus UMC alone   Bishop et al. [60] and Cruser et al. [61] (studies rated as level B quality) compared respectively MT1 (2–3 sessions per week over four weeks) and MT3 (1 session per week over four weeks) combined with UMC, to UMC alone in patients with acute LBP from QTF 1–2.

Bishop et al. [60] reported clinically relevant differences in favour of the intervention group in terms of functional improvement (P = 0.002 and mean difference of 2.6) at 16 and 24 weeks, but there were no significant differences for pain and physical functioning. In the short-term (4 weeks), Cruser et al. [61] determined clinically relevant differences in favour of MT3 compared to UMC alone for pain now (P = 0.025 and SMD of 1.04) and pain typical (P = 0.020 and SMD of 0.88) and a standardized mean difference of 0.56 for function associated with significantly greater satisfaction with treatment and overall-health improvement (P<0.01). The authors concluded that compared to UMC, MT160 and MT361 combined with UMC provides clinically greater improvement in function and pain relief.

      Effects of interventions on chronic LBP

MT versus sham-MT   Ghroubi et al. [62] and Senna et al. [63] (studies rated as level A quality) investigated, respectively, the effectiveness of MT1 in a side-lying position (painful side-up) and MT1 in supine position (toward the painful side), as compared to sham-MT1 (mimic of lumbo-pelvic manipulation without final impulsion to provide minimal likelihood of therapeutic effect); on pain, function and overall health in patients with chronic LBP from QTF 1–2. True-MT1 of 4 sessions spread over one month for Ghroubi et al., [62] or 16 sessions over 1 month for Senna et al., [63] led to significant improvements for pain ([Ghroubi et al. [62] reported standardized mean difference of 0.86 at 4–8 weeks with P<0.001]; [Senna et al. [63] reported mean difference of 1.9 at 10 months with P<0.005]), for functional outcomes ([Ghroubi et al. [62] reported standardized mean difference of 0.40 at 4–8 weeks with P<0.001]; [Senna et al. [63] reported mean difference of 18.9 at 10 months with P<0.001]). Only Senna et al. [63] reported an overall-health improvement of mean difference of 7.8 at 10 months (P<0.001). The authors [62, 63] concluded that MT1 is clinically effective in treating patients with chronic LBP in the short-term, but to obtain long-term benefit on all outcome measures requires maintenance of MT1 every 2 weeks. [63]

MT combined with other interventions   Niemistö et al. [32] (rated as level B quality) investigated the effects of combined MT2 (myotensive lumbo-pelvic mobilization techniques) with exercises (stabilizing exercise to correct lumbo-pelvic rhythm) and UMC in comparison to UMC alone (patient education, stay active approach, ergonomic instruction, home general exercises, and educational-booklet) in patients with chronic LBP from QTF 1–3. They found that the intervention group provided clinically relevant improvements in pain relief (P<0.001 and standardized mean difference of 0.60) and function (P = 0.002 and standardized mean difference of 0.45) from the short to long-term (up to one year). However, there were no significant differences between the groups in terms of the quality-of-life and medical costs.

Aure et al. [49] (rated as level B quality) evaluated the effectiveness of MT3 (consisting of mobilization and rotational manipulation in side-lying position from T10 to the pelvis) combined with specific and general exercise in comparison to exercises only in patients with chronic LBP from QTF 1–3. Both groups received 16 sessions of 45 minutes over 8 weeks. The results showed statistically significant improvements in terms of pain reduction and function in both groups. However, there was a greater improvement in all outcome measures for the intervention group leading to clinically relevant differences in the very-short to long-term on pain (at one year: P<0.05 and mean difference of 1.5) and functional improvement (at one year: P<0.05 and mean difference of 9), as well as for return to work rate (at 2 months; P<0.01 mean difference of 40%).

Cecchi et al. [34] (rated as level B quality) compared one group receiving MT3 combined with UMC, to another group receiving back-school with UMC to another group receiving individual physiotherapy (passive and assisted mobilization, active exercises, massage, and proprioceptive-neuromuscular-facilitation) with UMC in patients with chronic LBP of type QTF 1–2. The results showed that MT3 led to clinically relevant decrease in pain (at 12 months: P<0.001, standardized mean of difference of 0.7 and 1.1) and a greater functional recovery (at 12 months: P<0.001, standardized mean of difference of 0.70 and 0.73) than the two control groups at long term. However, the intervention group (MT3) received significantly more treatment than the two control groups at follow-up. Pain recurrence and drug intake were also significantly reduced in the MT3 group (P<0.001).

Rasmussen et al. [64] (rated as a level B quality) compared the effects of combined MT1 (in a side-lying position at the lumbar level of reduced movement) with exercises (two different extension exercises performed as often as possible during the day and at least once per hour), to the extension exercises alone in patients with chronic LBP classified as QTF 1–3. Both groups showed clinically relevant back and leg pain reduction, and no difference between the groups could be observed at the one month and one year follow-ups. Importantly, four patients in the intervention group and three in the control group reported worsening of back pain after 4 weeks, 3 months and one year.


The purpose of this SR was to assess and update the evidence pertaining to the effectiveness of different MT approaches in isolation or when combined with exercise or UMC in the management of LBP. Thus, this SR deviates and provides clinicians and researchers with new information compared with other recent high quality SRs [41, 43, 45] which are focused more on manipulation. A detailed summary of these updated findings, as well as the strength of their evidence and level of agreement with existing studies, are presented in Table 4. [7, 30, 35–38, 41, 43, 45]

In comparison to recent SRs, [36, 41, 43, 45] the present results highlight a number of new issues in the management of LBP with MT:

  • Firstly, in comparison to previous reports of limited-evidence [41, 43] showing no-difference between true and sham manipulation, the results of this SR show moderate to strong evidence [57–59, 62, 63] for the beneficial effects of MT1 in comparison to sham-MT1. These differences are demonstrated in terms of pain relief, functional improvement, and overall-health and quality of life improvements in the short-term for all stages of LBP.

  • Secondly, in patients with acute–subacute LBP, in contrast to the previous reports of limited evidence of no-difference for manipulation combined with other interventions, [41] we determined moderate-evidence [60, 61] to support MT1 and MT3 combined with UMC, in comparison to UMC alone, for pain, function, overall-health and quality of life. [60, 61]

  • Thirdly in patients with chronic LBP, in contrast to the previous reports of varying quality evidence (ranging from limited to strong) that manipulation has short term efficacy when combined with other interventions, [43] we found moderate evidence [34, 49] in support of the use of MT3 combined with exercises or UMC, in comparison to exercise alone or back-school, for pain, function and return to work from short to long-term. In addition limited evidence [32] supports the use of MT2 combined with exercises and UMC, in comparison to UMC alone, for pain and function from short to long-term. Finally, there is limited evidence of no-difference in efficacy for MT1 combined with extension-exercises, in comparison to extension-exercises alone for pain. [64]

The highest quality clinical research study is the conventional RCT. These studies have good internal validity but at the expense of external validity. An alternative for ‘real world’ application is a pragmatic RCT which has good external validity but poor internal validity. [65] Pragmatic clinical trials are becoming a frequently used tool to evaluate complex interventions. [66] Another possibility is to extend the conventional RCT to retain some of its key advantages (e.g. Cochrane criteria shown in Appendix 1), and use a ‘quasi-double-blind’ design to make a realistic compromise between internal and external validity. The CONSORT guidelines should also be considered to develop high quality study designs. [67]

One of the key issues in MT research is developing a plausible placebo or sham technique. A sham manipulation should be an appropriate placebo procedure because it mimics interaction between the intervention, the patient, the practitioner and the environment. Moreover, researchers need to conceptualize placebo not only as a comparative inert intervention, but also as a potential mechanism to partially account for treatment effects associated with MT. [68]

In the present SR, only five studies were placebo-controlled, four of them using sham adjustment, [31, 57, 58, 62, 63] while one used a real manipulation at the incorrect spinal level to achieve an authentic placebo response. [59] Further research is required to identify a plausible placebo response.

In the majority of RCTs addressing the effectiveness of MT, LBP patients are treated as a homogeneous group while recent research suggests that people with LBP in fact comprise a heterogeneous group. [40, 65, 69] Consequently, the concept of subgrouping among people with LBP is growing in the MT literature. [65] Classification of patient into sub-groups and the application of specific MT interventions for each sub-group have been shown to be more efficient. [28, 69–74] For example, a treatment based classification system to identify MT for people with LBP is one form of subgrouping. [28] The Start-Back-Tool is another approach that aims to sub-classify according to psychosocial issues, and has been found to be more effective than a non-subgrouping approach. [75, 76] Moreover, the patients’ beliefs and expectations regarding treatment effects of MT interventions has also shown to be an important predictor of treatment outcome. [77] Targeted MT for specific subgroups is important because of the heterogeneity of people with LBP, future clinical trials should address the ‘wash-out’ effect of applying treatments for unclassified LBP. [78]

In terms of quality of the MT management, MT should always be based on evidence-based-practice, which incorporates patient values (bio-psycho-social influences), clinical expertise and reasoning on part of the clinician, as well as the best available clinical research evidence. [5, 79–81] It could also be useful to establish a minimum level of practical skills across the range of commonly used MT techniques to manage people with LBP, and to improve clinical reasoning skills dealing with the complexity of LBP. [65] Future studies should incorporate clinical expertise as a factor in treatment trials for LBP.


The results of our SR should be interpreted in the light of some limitations. Firstly, there was heterogeneity in the RCTs evaluated in this study including the data presentation and outcome measures. Consequently, a meta-analysis enabling pooled statistics of effect was not possible. Furthermore, the strength of evidence comprising this SR is limited (particularly for the stronger level of evidence) due to the difficulty of a true double-blind study design and because of the limited number of high quality studies. Finally, only studies published in English from 2000 to 2013 were reviewed, leading to the possibility of relevant articles existing in other languages or before 2000.


This SR, based on low-risk of bias studies, has provided a comprehensive review of different MT approaches in patients with different stages of LBP, informing evidence-based-practice. Based on the results of this SR, a variety of manual procedures combined or not with other interventions, including exercise, may improve patient management. The summary findings of this review are both comprehensive and novel and may be used to guide clinical practice and future studies of this topic.

Recommendations for future research to investigate MT include pragmatic high quality RCTs to maximize the application of results to clinical practice and to reflect the complexity of clinical reasoning and multi-modal management of MT. Future studies should also investigate targeted MT for specific subgroups of people with LBP, and continue to address the complex issue of the best placebo procedure in MT trials.


The authors thank for their contributions: Dr Léon Plaghki as scientific adviser and Anne Klöcker for writing corrections (University of Louvain, Belgium).

Appendix 1

Search strategy in MEDLINE In MeSH (MEDLINE), ‘Manual Therapy’ was used as a free-term. The result of the MeSH Heading was ‘Musculoskeletal-Manipulations’ and we added ‘Low-Back-Pain’ to the MEDLINE search box as follows: ‘Musculoskeletal-Manipulations’[Mesh] AND ‘Low-Back-Pain’[Mesh] AND (‘humans’[MeSH-Terms] AND (‘male’[MeSH-Terms] OR ‘female’[MeSH-Terms]) AND Randomized-Controlled-Trial[ptyp] AND English[lang] AND ‘adult’[MeSH-Terms] AND ‘2000/01/01’[PDat]: ‘2013/04/01’[PDat]).

      Risk of bias assessment

Criteria list for methodological quality assessment from Cochrane Collaboration Back Review Group

A   Was the method of randomization adequate? Yes/No/Don’t know

B   Was the treatment allocation concealed? Yes/No/Don’t know

C   Were the groups similar at baseline regarding the most important prognostic indicators? Yes/No/Don’t know

D   Was the patient blinded to the intervention? Yes/No/Don’t know

E   Was the care provider blinded to the intervention? Yes/No/Don’t know

F   Was the outcome assessor blinded to the intervention? Yes/No/Don’t know

G   Were cointerventions avoided or similar? Yes/No/Don’t know

H   Was the compliance acceptable in all groups? Yes/No/Don’t know

I   Was the drop-out rate described and acceptable? Yes/No/Don’t know

J   Was the timing of the outcome assessment in all groups similar? Yes/No/Don’t know

K   Did the analysis include an intention-to-treat analysis? Yes/No/Don’t know

      Operationalization of the criteria list

A:   A random (unpredictable) assignment sequence. Examples of adequate methods are computer generated random number table and use of sealed opaque envelopes. Methods of allocation using date of birth, date of admission, hospital numbers, or alternation should not be regarded as appropriate.

B:   Assignment generated by an independent person not responsible for determining the eligibility of the patients. This person has no information about the persons included in the trial and has no influence on the assignment sequence or on the decision about eligibility of the patient.

C:   In order to receive a ‘yes,’ groups have to be similar at baseline regarding demographic factors, duration and severity of complaints, percentage of patients with neurologic symptoms, and value of main outcome measure(s).

D:   The reviewer determines if enough information about the blinding is given in order to score a ‘yes.’

E:   The reviewer determines if enough information about the blinding is given in order to score a ‘yes.’

F:   The reviewer determines if enough information about the blinding is given in order to score a ‘yes.’

G:   Cointerventions should either be avoided in the trial design or similar between the index and control groups.

H:   The reviewer determines if the compliance to the interventions is acceptable, based on the reported intensity, duration, number and frequency of sessions for both the index intervention and control intervention(s).

I:   The number of participants who were included in the study but did not complete the observation period or were not included in the analysis must be described and reasons given. If the percentage of withdrawals and drop-outs does not exceed 20% for short-term follow-up and 30% for long-term follow-up and does not lead to substantial bias a ‘yes’ is scored. (NB these percentages are arbitrary, not supported by literature).

J:   Timing of outcome assessment should be identical for all intervention groups and for all important outcome assessments.

K:   All randomized patients are reported/analyzed in the group they were allocated to by randomization for the most important moments of effect measurement (minus missing values) irrespective of noncompliance and cointerventions.

Appendix 2

Please review the Full Text article


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