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Table 2 Standard error of measurement (SEM) and intraclass correlation coefficients (ICC) of relative phase of C7-T8, C7-sacrum and T8-sacrum

From: Reliability and validity of spinal coordination patterns during treadmill walking in persons with thoracic spine pain – a preliminary study

   Case subjects Control subjects
Speed (m/s)   C7-T8 C7-sacrum T8-sacrum C7-T8 C7-sacrum T8-sacrum
0.67 SEM degrees 4.2 (3.2–6.2) 2.5 (1.9–3.7) 2.6 (2.0–3.8) 4.5 (3.4–6.7) 2.8 (2.1–4.1) 2.8 (2.2–4.2)
  ICC (CI) .87 (.70–.95) .66 (-.08–.91) .64 (-.09–.90) .88 (.68–.96) .70 (-.06–.93) .74 (-.07–.93)
0.89 SEM degrees 5.3 (4.0–7.9) 3.5 (2.6–5.2) 4.33.3–6.4) 5.7 (4.3–8.4) 4.0 (3.0–5.9) 3.0 (2.3–4.4)
  ICC (CI) .86 (.68–.95) .66 (-.08–.91) .49 (-.10–.82) .89 (.72–.96) .68 (-.04–.90) .71 (-.06–.93)
1.12 SEM degrees 6.3 (4.8–9.4) 4.4 (3.3–6.5) 6.8 (5.1–10.0) 11.8 (8.9–17.4) 4.7 (3.5–6.9) 9.4 (7.1–13.9)
  ICC (CI) .91 (.79–.97) .55 (-.06–.87) .44 (-.11–.78) .70 (.38–.87) .74 (-.07–.93) .41 (-.01–.71)
1.34 SEM degrees 8.8 (6.7–13.0) 3.9 (3.0–5.8) 7.1 (5.4–10.6) 6.9 (5.2–10.2) 5.2 (3.9–7.7) 4.9 (3.7–7.2)
  ICC (CI) .36 (-.11–.70) .64 (.02–.87) .08 (-.32–.48) .66 (.30–.85) .64 (.27–.85) .65 (.21–.86)
1.56 SEM degrees 5.1 (3.9–7.6) 2.0 (1.5–2.9) 4.1 (3.1–6.1) 4.8 (3.6–7.1) 3.7 (2.8–5.4) 2.0 (1.5–3.0)
  ICC (CI) .47 (.06–.76) .65 (-.09–.90) .49 (.08–.76) .66 (.30–.85) .55 (.02–.82) .78 (.01–.94)
  1. SEM = standard error of measurement.
  2. ICC = intraclass correlation coefficient.
  3. CI = 95% confidence interval; CIs for SEM and ICC in parentheses.
  4. ICCs above 0.85 with narrow CIs are indicated in bold.