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Table 2 Intra-rater reliability. Twenty healthy subjects tested twice by A or B. Further explanations in Table 1.

From: The reliability of a 10-test package for patients with prolonged back and neck pain: could an examiner without formal medical education be used without loss of quality? A methodological study

10-test package (including 16 sub-tests): Forward bending (cm) Modified Schober (cm) Lateral bending (cm) Trunk rotation (°) Active-straight-leg raise (°) Cervical bending (°) Cervical rotation (°) Abdom. endurance (sec) Mod. Biering-Sørensen (sec.) Modified PILE (kg)  
    Right Left Right Left Right Left Forward Backward Right Left    Lumbar Cervial
Examiner A                 
ICC .95 .87 .99 .94 .92 .96 .99 .97 .86 .98 .94 .86 .90 .92 .93 .95
95% CI of ICC .89–.99 .68–.96 .95–1.00 .82–.98 .76–.97 .87–.99 .96–1.00 .92–.99 .67–.96 .95–.99 .82–.98 .63–.95 .75–.97 .75–.97 .80–.98 .86–.98
SE of measurement .9 .3 .5 1.0 3 3 2 3 2 2 2 3 9 16 2.3 1.5
Mean 2.5 7.1 21.2 21.0 55 53 75 78 58 75 72 74 66 117 31.8 20.8
Mean difference -.7 .2 -.1 .1 1 -1 0 1 2 1 1 -1 7 4 .8 .4
95% CI of mean diff. -1.6–.1 -.1–.5 -.5–.5 -.9–1.1 -2.6–3.6 -3.8–1.8 -1.6–1.4 -1.7–3.3 -.8–4.0 -.5–2.5 -1.4–3.0 -3.8–1.4 -2.7–15.7 -12.3–19.3 -1.6–3.2 -1.1–1.9
p-value NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS
Intra-rater reliability + + + + + + + + + + + + + + + +
Examiner B                 
ICC .95 .79 .73 .86 .46 .83 .97 .93 .62 .80 .82 .82 .65 .20 .97 .94
95% CI of ICC .86–.98 .46–.93 .37–.91 .61–.95 .13–.85 .54–.94 .90–.99 .78–.97 .12–.85 .53–.94 .53–.94 .52–.94 .18–.86 .14–.85 .89–.99 .83–.98
SE of measurement .9 .7 1.6 1.4 7 5 3 4 6 5 4 4 17 17 2.4 2.9
Mean 1.8 7.2 19.8 19.7 48 51 70 76 57 67 68 67 46 104 32.8 23.5
Mean difference .4 .2 -.7 -.2 -8 -1 0 -1 -1 3 -1 -1 3 33 .0 -1.8
95% CI of mean diff. -.5–1.3 -.5–.9 -2.3–.9 -1.6–1.2 -14.7–.3 -6.3–4.3 -2.8–3.0 -4.9–3.5 -6.7–5.6 -2.0–7.6 -5.4–2.6 -4.7–2.7 -14.3–20.5 15.3–50.5 -2.4–2.4 -4.7–1.1
p-value NS NS NS NS .04 NS NS NS NS NS NS NS NS .002 NS NS
Intra-rater reliability + + + + - + + + + + + + + - + +