Table 6.
Mean difference between trials (95 % confidence interval (CI)) in pressure pain threshold (PPT, kPa) for the 14 locations (P1 to P14) covering the low back region, for left and right side (Pleft and Pright) as well as overall low back (Pall). See “Procedure to mark the 14 anatomical locations” for explanation concerning the locations of PPT assessments
| Trial 1−Trial 2 | Trial 1−Trial 3 | Trial 2−Trial 3 | |
|---|---|---|---|
| Mean PPT difference (95 % CI) | Mean PPT difference (95 % CI) | Mean PPT difference (95 % CI) | |
| P1 | 2.6 (0.6 to 4.6) | 9.2 (8.3 to 10.1) | 6.6 (3.7 to 9.5) |
| P2 | −1.6 (−3.6 to 0.3) | −22.6 (−28.2 to −17.1) | −21.0 (−24.6 to −17.4) |
| P3 | 19.1 (17.7 to 20.6) | −7.2 (−7.7 to −6.7) | −26.4 (−28.3 to −24.4) |
| P4 | −3.8 (−16.4 to 8.8) | −29.7 (−43.7 to −15.7) | −25.9 (−27.3 to −24.5) |
| P5 | −8.3 (−21.4 to 4.9) | −6.4 (−14.3 to 1.4) | 1.8 (−3.4 to 7.1) |
| P6 | −16.0 (−23.4 to −8.6) | −33.0 (−37.6 to −28.3) | −17.0 (−19.8 to −14.2) |
| P7 | −31.2 (−43.6 to −18.8) | −27.7 (−30.5 to −24.9) | 3.5 (−6.1 to 13.1) |
| P8 | −33.0 (−42.5 to −23.6) | −40.1 (−48.8 to - 31.3) | −7.0 (−7.7 to −6.4) |
| P9 | −21.0 (−30.0 to −11.9) | −39.0 (−39.2 to −38.8) | −18.0 (−26.9 to −9.2) |
| P10 | 0.2 (−2.9 to 3.3) | −33.1 (−39.4 to −26.9) | −33.3 (−36.5 to −30.1) |
| P11 | −40.1 (−40.9 to −39.4) | −38.3 (−42.5 to −34.1) | 1.8 (−1.6 to 5.3) |
| P12 | −32.8 (−34.2 to −31.5) | −20.8 (−25.6 to −16.0) | 12.0 (5.8 to 18.2) |
| P13 | −17.2 (−17.7 to 16.8) | −35.2 (−36.5 to −33.8) | −18.0 (−18.9 to −17.0) |
| P14 | −25.5 (−27.3 to −23.7) | −47.4 (−36.5 to −33.8) | −21.9 (−28.0 to −15.9) |
| Pleft | −12.2 (−15.5 to −8.9) | −24.6 (−28.6 to −20.6) | −12.4 (−13.1 to −11.8) |
| Pright | −17.6 (−24.9 to −10.3) | −28.4 (−31.9 to −25.0) | −10.8 (−14.7 to −6.9) |
| Pall | −14.9 (−20.0 to −9.8) | −26.5 (−30.2 to −22.9) | −11.6 (−13.1 to −10.1) |