Table 3 Intraclass correlation coefficients (ICC), standard error of measurement (SEM) and minimum detectable change (MDC) for pressure pain thresholds assessed over the overall low back P_all (representing the average of the 14 PPT assessments) between the mean of the first and second trials (T1-T2), the first and the third trials (T1-T3), the second and the third trials (T2-T3) and the means of the three trials (T1-T2-T3) using gender and a median split for age, BMI and, pain intensity

0.98 (0.93–0.99)

35.8

99.2

17.3

0.95 (0.87–0.98)

50.1

138.9

24.1

0.98 (0.95–0.99)

30.6

84.9

14.5

0.97 (0.93–0.99)

39.5

109.5

18.9

0.97 (0.91–0.99)

36.8

102.1

25.0

0.95 (0.86–0.98)

49.1

136.1

32.7

0.99 (0.97–1.00)

24.0

66.5

15.8

0.97 (0.93–0.99)

37.8

104.8

25.3

0.97 (0.92–0.99)

36.4

101.0

20.3

0.96 (0.87–0.98)

47.7

132.3

26.3

0.99 (0.96–1.00)

23.4

65.0

13.2

0.97 (0.94–0.99)

37.0

102.5

20.5

0.98 (0.91–0.99)

35.9

99.5

19.8

0.96 (0.94–0.99)

51.8

143.6

28.3

0.98 (0.95–0.99)

32.0

88.7

17.0

0.97 (0.93–0.99)

40.6

112.5

22.1

0.95 (0.86–0.98)

42.7

118.3

25.0

0.91 (0.75–0.97)

56.2

155.7

32.6

0.97 (0.91–0.99)

34.5

95.6

19.9

0.95 (0.87–0.98)

45.1

124.9

26.2

0.98 (0.96–1.00)

28.9

80.0

15.3

0.97 (0.91–0.99)

43.0

119.2

22.5

0.99 (0.98–0.99)

19.9

55.2

10.2

0.99 (0.96–1.00)

31.9

88.3

16.6

0.97 (0.87–0.99)

37.9

105.0

17.8

0.93 (0.79–0.97)

57.9

160.4

26.9

0.98 (0.88–0.99)

35.2

97.6

16.0

0.96 (0.90–0.99)

44.6

123.6

20.7

0.97 (0.92–0.99)

34.5

95.6

23.0

0.96 (0.89–0.99)

40.5

112.4

26.6

0.99 (0.97–1.00)

18.7

51.7

12.4

0.97 (0.94–0.99)

32.4

89.7

21.4