Table 4. Mean (±SD); Standard Error of Measurement (SEM); Minimal Detectable Change (MDC); Intraclass Correlation Coefficient (ICC), 95% Confidence Interval (CI) of ICC, and 95% Limits of Agreement (LoA) for Pressure Pain Threshold (PPT) among 14 lumbar locations, left locations (Pleft), right locations (Pright) point and all the locations (Pall) when 1,2 or 3 trials during session 1 and session 2 are compared.
| Number of trials | Points | Mean | Mean | SEM | MDC | MDC | ICC | 95% LOA | p-value |
|---|---|---|---|---|---|---|---|---|---|
| Session 1 (SD) | Session 2 (SD) | (kPa) | (kPa) | (%) | (95% CI) | ||||
| 1 | Point 1 | 553.5 (235.4) | 530.2 (167.7) | 75 | 209 | 39 | 0.86 (0.64 - 0.95) | -190.89 - 237.42 | 0.7575 |
| Point 2 | 520.7 (191.8) | 518.4 (194.7) | 67 | 186 | 36 | 0.87 (0.67 - 0.96) | -192.77 - 197.43 | 0.9739 | |
| Point 3 | 633.7 (250.5) | 660.7 (251.3) | 77 | 212 | 33 | 0.90 (0.74 - 0.97) | -243.45 - 189.32 | 0.7698 | |
| Point 4 | 677.6 (207.1) | 678.4 (233.3) | 43 | 119 | 18 | 0.96 (0.89 - 0.99) | -125.62 - 124.02 | 0.9921 | |
| Point 5 | 633.7 (234.8) | 648.0 (254.9) | 74 | 206 | 32 | 0.90 (0.74 - 0.97) | -228.74 - 200.21 | 0.2770 | |
| Point 6 | 620.5 (246.9) | 634.5 (249.9) | 89 | 247 | 39 | 0.87 (0.65 - 0.95) | -271.13 - 243.13 | 0.8784 | |
| Point 7 | 534.9 (234.1) | 536.7 (221.2) | 60 | 165 | 31 | 0.93 (0.80 - 0.98) | -175.36 - 171.63 | 0.9822 | |
| Point 8 | 547.4 (254.1) | 562.2 (222.2) | 74 | 206 | 37 | 0.90 (0.73 - 0.97) | -228.71 - 199.11 | 0.8664 | |
| Point 9 | 654.5 (239.4) | 645.5 (234.1) | 80 | 222 | 34 | 0.88 (0.68 - 0.96) | -223.79 - 241.66 | 0.9184 | |
| Point 10 | 590.1 (263.5) | 637.6 (240.0) | 54 | 150 | 24 | 0.95 (0.79 - 0.99) | -173.19 - 78.25 | 0.6100 | |
| Point 11 | 653.6 (252.5) | 669.1 (232.5) | 65 | 179 | 27 | 0.93 (0.80 - 0.97) | -201.48 - 170.42 | 0.8621 | |
| Point 12 | 641.6 (272.3) | 673.0 (258.6) | 52 | 145 | 22 | 0.96 (0.88 - 0.99) | -169.82 - 107.02 | 0.7485 | |
| Point 13 | 623.7 (256.8) | 661.5 (237.2) | 95 | 262 | 41 | 0.85 (0.62 - 0.95) | -302.81 - 227.21 | 0.6785 | |
| Point 14 | 630.6 (263.9) | 643.9 (238.9) | 89 | 248 | 39 | 0.87 (0.66 - 0.95) | -271.63 - 244.97 | 0.8857 | |
| Pleft | 602.5 (243.3) | 620.3 (219.3) | 51 | 143 | 23 | 0.95 (0.86 - 0.98) | -163.59 - 127.94 | 0.8346 | |
| Pright | 614.1 (217.6) | 622.5 (216.4) | 37 | 102 | 17 | 0.91 (0.76 - 0.97) | -201.86 - 142.34 | 0.7008 | |
| Pall | 608.3 (228.5) | 621.4 (216.8) | 41 | 114 | 19 | 0.95 (0.85 - 0.98) | -159.01 - 111.42 | 0.7660 | |
| 2 | Point 1 | 533.5 (230.7) | 532.2 (178.0) | 53 | 147 | 28 | 0.93 (0.81 - .098) | -152.94 - 155.48 | 0.9867 |
| Point 2 | 532.7 (226.0) | 536.1 (203.2) | 55 | 153 | 29 | 0.93 (0.81 - 0.98) | -163.63 - 156.76 | 0.9654 | |
| Point 3 | 637.8 (258.6) | 646.9 (259.2) | 52 | 146 | 23 | 0.96 (0.88 - 0.99) | -161.09 - 142.83 | 0.9237 | |
| Point 4 | 675.9 (220.0) | 700.1 (234.5) | 47 | 130 | 19 | 0.96 (0.88 - 0.98) | -151.96 - 103.63 | 0.7731 | |
| Point 5 | 655.3 (239.8) | 659.4 (233.0) | 63 | 175 | 27 | 0.93 (0.79 - 0.97) | -188.14 - 180.01 | 0.4137 | |
| Point 6 | 636.0 (246.3) | 657.3 (261.4) | 64 | 177 | 27 | 0.93 (0.82 - 0.98) | -202.58 - 159.91 | 0.8197 | |
| Point 7 | 552.7 (234.9) | 549.1 (224.6) | 52 | 143 | 26 | 0.95 (0.85 - 0.98) | -147.01 - 154.34 | 0.9655 | |
| Point 8 | 562.1 (257.8) | 566.0 (227.9) | 45 | 124 | 22 | 0.97 (0.90 - 0.99) | -133.75 - 125.89 | 0.9650 | |
| Point 9 | 649.9 (251.6) | 661.2 (237.5) | 50 | 137 | 21 | 0.96 (0.88 - 0.99) | -153.98 - 131.38 | 0.9002 | |
| Point 10 | 611.0 (255.7) | 621.7 (234.4) | 32 | 89 | 15 | 0.98 (0.95 - 0.99) | -102.29 - 80.89 | 0.9057 | |
| Point 11 | 664.1 (238.5) | 670.7 (233.9) | 65 | 179 | 27 | 0.92 (0.79 - 0.97) | -194.01 - 180.88 | 0.9399 | |
| Point 12 | 659.5 (267.4) | 665.6 (249.8) | 41 | 112 | 17 | 0.97 (0.93 - 0.99) | -123.84 - 111.64 | 0.9490 | |
| Point 13 | 643.2 (242.2) | 673.0 (234.4) | 62 | 171 | 26 | 0.93 (0.81 - 0.98) | -198.91 - 139.31 | 0.7345 | |
| Point 14 | 625.5 (261.7) | 641.9 (236.6) | 57 | 158 | 25 | 0.95 (0.85 - 0.98) | -179.27 - 146.53 | 0.8587 | |
| Pleft | 609.3 (244.0) | 618.8 (225.3) | 33 | 92 | 15 | 0.98 (0.94 - 0.99) | -103.89 - 84.94 | 0.9128 | |
| Pright | 624.8 (227.1) | 635.7 (218.2) | 31 | 87 | 14 | 0.98 (0.94 - 0.99) | -99.62 - 78 | 0.7887 | |
| Pall | 617.1 (234.2) | 627.2 (220.6) | 30 | 84 | 14 | 0.98 (0.95 - 0.99) | -96.20 - 75.92 | 0.8514 | |
| 3 | Point 1 | 526.7 (222.6) | 537.8 (177.0) | 49 | 136 | 26 | 0.94 (0.83 - 0.98) | -152.32 -130.14 | 0.8810 |
| Point 2 | 537.3 (223.6) | 531.4 (193.2) | 48 | 134 | 25 | 0.94 (0.84 - 0.98) | -134.61 -146.47 | 0.9386 | |
| Point 3 | 648.3 (252.7) | 655.7 (255.8) | 48 | 134 | 21 | 0.96 (0.89 - 0.99) | -147.88 -133.03 | 0.9368 | |
| Point 4 | 672.4 (217.6) | 701.2 (235.8) | 43 | 118 | 17 | 0.96 (0.88 - 0.99) | -138.51 -80.73 | 0.7300 | |
| Point 5 | 657.9 (238.5) | 662.4 (234.2) | 54 | 150 | 23 | 0.95 (0.85 - 0.98) | -161.65 - 152.58 | 0.5269 | |
| Point 6 | 653.0 (247.2) | 661.0 (257.8) | 57 | 157 | 24 | 0.95 (0.85 - 0.98) | -172.42 - 156.28 | 0.9309 | |
| Point 7 | 563.6 (232.6) | 544.8 (213.2) | 50 | 139 | 25 | 0.95 (0.86 - 0.98) | -122.04 - 159.60 | 0.8194 | |
| Point 8 | 569.8 (244.6) | 574.7 (227.3) | 42 | 116 | 20 | 0.97 (0.91 - 0.99) | -126.58 - 116.63 | 0.9544 | |
| Point 9 | 660.1 (246.4) | 667.0 (230.8) | 39 | 107 | 16 | 0.97 (0.92 - 0.99) | -118.44 - 104.66 | 0.9376 | |
| Point 10 | 617.7 (251.1) | 632.5 (232.9) | 37 | 104 | 17 | 0.98 (0.93 - 0.99) | -119.91 - 90.17 | 0.8677 | |
| Point 11 | 671.6 (242.2) | 671.3 (239.3) | 54 | 149 | 22 | 0.95 (0.85 - 0.98) | -156.27 - 156.85 | 0.9974 | |
| Point 12 | 653.7 (258.0) | 672.2 (247.5) | 45 | 124 | 19 | 0.97 (0.91 - 0.99) | -144.05 - 107.16 | 0.8431 | |
| Point 13 | 648.6 (233.7) | 674.1 (229.4) | 42 | 116 | 18 | 0.97 (0.90 - 0.99) | -136.42 - 85.35 | 0.7649 | |
| Point 14 | 617.6 (252.6) | 647.8 (237.9) | 52 | 145 | 23 | 0.95 (0.86 - 0.98) | -170.55 - 110.15 | 0.7386 | |
| Pleft | 612.4 (238.0) | 626.0 (224.2) | 34 | 94 | 15 | 0.98 (0.94 - 0.99) | -108.19 - 81.03 | 0.8734 | |
| Pright | 630.2 (224.2) | 636.0 (215.8) | 26 | 71 | 11 | 0.99 (0.96 - 1.00) | -79.86 - 68.19 | 0.8708 | |
| Pall | 621.3 (229.5) | 631.0 (219.0) | 28 | 77 | 12 | 0.98 (0.95 - 0.99) | -88.38 - 68.96 | 0.8711 |