Spinal Manipulative Therapy Specific Changes In Pain Sensitivity In Individuals With Low Back Pain (NCT01168999)

doi:10.1016/j.jpain.2013.10.005

Table 3

Immediate changes in pain sensitivity

		Mechanical Pain Sensitivity PSIS	Mechanical Pain Sensitivity Dorsum of the Foot	Suprathreshold Heat Response	Aftersensation

SMT	Pre	19.12 (20.96)	22.14 (20.16)	36.57 (22.81)	13.75 (12.46)
SMT	Post	18.56 (23.18)	26.10 (26.77)	29.54 (23.64)^{^*}^&	6.00 (4.57)

Placebo	Pre	26.48 (30.02)	23.22 (25.76)	31.04 (22.01)	12.67 (9.25)
Placebo	Post	23.64 (28.93)	24.16 (27.00)	34.07 (24.37)	11.67 (13.69)

Placebo+	Pre	18.81 (23.82)	15.24 (15.28)	27.00 (22.19)	6.75 (3.58)
Placebo+	Post	11.78 (16.67)	20.39 (29.14)	25.78 (22.78)	3.63 (2.39)

No Treatment	Pre	21.68 (26.46)	29.27 (27.92)	26.61 (24.92)	9.62 (11.09)
No Treatment	Post	21.23 (27.20)	28.19 (26.53)	29.54 (23.64)	11.69 (13.79)

Total Sample	Pre	21.55 (25.39)	22.60 (23.16)	30.33 (23.07)	10.61 (9.85)
Total Sample	Post	18.89 (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 5^th 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 10^th pulse in the suprathreshold heat response protocol. 38/100 (34.5%) of participants reported persistent pain 15 seconds following the 10^th 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).