Neck pain patterns and subgrouping based on weekly SMS-derived trajectories

doi:10.1186/s12891-020-03660-0

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BMC Musculoskelet Disord. 2020; 21: 678.

Published online 2020 Oct 14. doi: 10.1186/s12891-020-03660-0

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Table 3

Distribution of patients in the defined variation patterns and subgroups

Defined patterns and subgroups	Prevalence n = 1206	Number of weeks with pain (0–43)	Number of days with pain per week, in weeks with any pain, (0–7)	Pain intensity in weeks with any pain, (0–10)	Total number of days with pain during 43 weeks, (0–301)
Defined patterns and subgroups	n (%)	Median (IQR)	Mean (SD)	Mean (SD)	Mean (SD)	Range
Ongoing
1 Severe	1 (0.1)	22	7.0 (0)	6.0 (0)	161 (0)	–
2 Moderate	1 (0.1)	40	7.0 (0)	5.0 (0)	280 (0)	–
3 Mild	0 (0)	–	–	–	–	–
4 Minor/recovered	49 (4.1)	0 (0–0)	0 (0–0)	0 (0–0)	0 (0–0)	0
Total Ongoing	51 (4.2)	0 (0–0)	7.0 (0)	5.5 (0.7)	4.5 (36)	0–280

Persistent fluctuating
5 Severe	54 (4.5)	43 (40–44)	6.0 (1.0)	7.2 (0.9)	252 (51)	116–301
6 Moderate	185 (15.4)	43 (39–44)	4.5 (1.5)	5.0 (0.6)	182 (68)	50–301
7 Mild	298 (25.0)	40 (34–43)	3.3 (1.4)	3.4 (0.6)	130 (66)	29–301
8 Minor	45 (3.9)	34 (26–40)	2.6 (1.4)	2.0 (0.5)	87 (68)	20–301
Total Persistent fluctuating	582 (48.3)	41 (35–43)	3.9 (1.7)	4.1 (1.4)	148 (75)	20–301

Episodic
9 Severe	276 (22.6)	20 (13–27)	2.9 (1.1)	3.9 (1.0)	59 (40)	5–217
10 Moderate	174 (13.9)	14 (8–22)	2.4 (0.9)	2.7 (0.6)	39 (29)	3–153
11 Mild	88 (7.3)	11 (6–18)	2.0 (1.1)	1.9 (0.5)	29 (33)	2–252
12 Minor	9 (0.8)	3 (3–12)	1.5 (0.5)	1.0 (0.0)	13 (13)	1–42
Total Episodic	547 (45.4)	17 (9–25)	2.6 (1.1)	3.2 (1.2)	47 (36)	1–252

Single episode
13 Severe	5 (0.4)	1 (1–1)	3.4 (1.5)	5.8 (1.1)	4.8 (2.6)	1–8
14 Moderate	11 (0.9)	1 (1–2)	2.5 (1.7)	4.0 (0.5)	4.0 (3.6)	1–14
15 Mild	7 (0.6)	1 (1–1)	2.1 (1.2)	2.4 (0.5)	2.3 (1.1)	1–4
16 Minor	3 (0.3)	1 (1–1)	1.0 (0.0)	1.0 (0.0)	1.0 (0.0)	1–1
Total Single episode	26 (2.2)	1 (1–1)	2.5 (1.5)	3.6 (1.6)	3.7 (2.8)	1–14

IQR = Interquartile range,
SD = Standard deviation

No patients were distributed into the Mild Ongoing subgroup. All patients in the Minor Ongoing/Recovered subgroup were recovered and as such had no days with pain per week and a mean NRS = 0