Table 4

PosturePrint® reliability with a liberal ICC method (ICC3,1). Forty student volunteers at a university were evaluated, with a posture digitizer, twice by three examiners, with a one-day delay.
Measure
 SEM*
 InterICC†
 95% C.I. ‡
 Intra ICC†
 95% C.I.
 MADOM§
Pelvis Rx
 1.3°
 0.88
 0.81–0.93
 0.92
 0.80 – 0.94
 2.6° ± 2.1
Thorax Rx
 0.9°
 0.93
 0.88–0.96
 0.92
 0.81 – 0.94
 1.6° ± 1.3
Head Rx
 1.5°
 0.95
 0.92–0.97
 0.93
 0.82 – 0.94
 3.2° ± 2.5
Pelvis Ry
 0.4°
 N/A||
 N/A
 N/A
 N/A
 0.6° ± 1.2
Thorax Ry
 0.8°
 N/A
 N/A
 N/A
 N/A
 0.9° ± 1.4
Head Ry
 0.6°
 N/A
 N/A
 N/A
 N/A
 1.1° ± 1.0
Pelvis Rz
 0.9°
 N/A
 N/A
 N/A
 N/A
 1.4° ± 1.4
Thorax Rz
 0.4°
 0.93
 0.89–0.96
 0.92
 0.79–0.94
 0.7° ± 0.6
Head Rz
 0.6°
 0.94
 0.90–0.97
 0.94
 0.84–0.95
 1.1° ± 0.8
Pelvis Tx
 1.7 mm
 0.89
 0.82 – 0.94
 0.94
 0.85 – 0.96
 3.9 mm ± 3.1
Thorax Tx
 1.7 mm
 0.94
 0.90 – 0.97
 0.93
 0.82 – 0.95
 3.3 mm ± 2.5
Head Tx
 2.3 mm
 0.89
 0.83 – 0.94
 0.85
 0.64 – 0.88
 4.0 mm ± 2.8
Pelvis Tz
 2.9 mm
 0.96
 0.94 – 0.98
 0.97
 0.91 – 0.97
 7.1 mm ± 5.6
Thorax Tz
 2.9 mm
 0.89
 0.82 – 0.93
 0.91
 0.78 – 0.93
 5.7 mm ± 4.5
Head Tz
 2.6 mm
 0.93
 0.88 – 0.96
 0.92
 0.79 – 0.93
 5.4 mm ± 4.7

* SEM = Standard error of measurement = Math.

† ICC = Intra- or inter-examiner correlation coefficient

‡ 95% C.I. = 95 percent confidence interval

§ MADOM = Mean absolute differences of observers' measurements

|| N/A = Not applicable, means the assumption of a normal distribution was violated by many identical values, and thus ICCs are not appropriate for this data.

Normand et al. Chiropractic & Osteopathy 2007 15:15   doi:10.1186/1746-1340-15-15