Table 3

Immediate changes in pain sensitivity

Mechanical Pain Sensitivity PSISMechanical Pain Sensitivity Dorsum of the FootSuprathreshold Heat ResponseAftersensation

SMTPre19.12 (20.96)22.14 (20.16)36.57 (22.81)13.75 (12.46)
Post18.56 (23.18)26.10 (26.77)29.54 (23.64)*&6.00 (4.57)

PlaceboPre26.48 (30.02)23.22 (25.76)31.04 (22.01)12.67 (9.25)
Post23.64 (28.93)24.16 (27.00)34.07 (24.37)11.67 (13.69)

Placebo+Pre18.81 (23.82)15.24 (15.28)27.00 (22.19)6.75 (3.58)
Post11.78 (16.67)20.39 (29.14)25.78 (22.78)3.63 (2.39)

No TreatmentPre21.68 (26.46)29.27 (27.92)26.61 (24.92)9.62 (11.09)
Post21.23 (27.20)28.19 (26.53)29.54 (23.64)11.69 (13.79)

Total SamplePre21.55 (25.39)22.60 (23.16)30.33 (23.07)10.61 (9.85)
Post18.89 (24.60)24.78 (27.12)29.45 (22.90)8.79 (10.94)
All data are reported as mean (standard deviation). Placebo+= placebo SMT provided with instructional set to enhance expectation. Suprathreshold heat response expressed as the rating of the 5th pulse in the suprathreshold heat response protocol using a numeric rating scale with 0= no pain to 100= worst pain imaginable. Aftersensation= pain report through numeric rating scale with 0= no pain to 100= worst pain imaginable provided 15 seconds following the 10th pulse in the suprathreshold heat response protocol. 38/100 (34.5%) of participants reported persistent pain 15 seconds following the 10th pulse in the suprathreshold heat response protocol. Aftersensation information is provided only for the participants who reported persistent pain.

*significant between group differences (p≤ 0.05)
&significant within group differences (p≤ 0.05).