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Table 2 Adjusted differences in pressure pain threshold (PPT) readings in kPa at regional testing site at four different times after the interventions

From: What is the effect of spinal manipulation on the pressure pain threshold in young, asymptomatic subjects? A randomized placebo-controlled trial, with a cross-over design

Time measurementsSPINAL MANIPULATIONSHAM procedureDifferences between groups (95% CI)P value
Means (SD)Min-Max
Values
95% CIMeans (SD)Min-Max
values
95% CI
Baseline406 (158)118–873361–451416 (162)143–877370–462−10 (−73;53)0.76
PPT 1446 (169)125–1048395–487447 (154)173–768389–482−1 (−64;63)0.98
PPT 2450 (168)137–903401–494438 (159)145–807386–47812(−53;77)0.72
PPT 3443 (158)125–853394–487438 (180)151–962387–4804(−50;58)0.90
PPT 4444 (161)146–823395–487432 (167)136–859378–47012(−51;75)0.71
  1. SD standard deviation, SE standard error, PPT pressure pain threshold, PPT 1 follow-up time 1 immediately after intervention, PPT2 follow-up time 2 at T + 12 min after intervention, PPT 3 follow-up time 3 at T + 24 min after intervention, PPT 4 follow-up time 4 at T + 36 min after intervention