Table 3

PosturePrint® reliability analysis with a conservative ICC method (ICC2,1). Three examiners evaluated forty student volunteers, with a posture digitizer, twice over 2 days.
Measure
 Mean
 SD*
 SEM†
 InterICC‡
 95% C.I. §
 Intra ICC‡
 95% C.I.
 MADBO||
Pelvis Rx
 3.2°
 4.5
 2.4°
 0.56
 0.44–0.68
 0.72
 0.59 – 0.82
 3.3° ± 2.6
Thorax Rx
 -3.1°
 3.1
 1.5°
 0.65
 0.53–0.76
 0.76
 0.64 – 0.86
 2.3° ± 1.7
Head Rx
 -1.2°
 5.7
 2.7°
 0.69
 0.58–0.79
 0.77
 0.66 – 0.86
 3.5° ± 2.7
Pelvis Ry
 -0.3°
 1.1
 0.9°
 N/A¶
 N/A
 N/A
 N/A
 0.6° ± 1.2
Thorax Ry
 0.2°
 1.3
 1.2°
 N/A
 N/A
 N/A
 N/A
 1.0° ± 1.4
Head Ry
 -0.1°
 1.8
 1.2°
 N/A
 N/A
 N/A
 N/A
 1.6° ± 1.3
Pelvis Rz
 -0.3°
 1.5
 1.3°
 N/A
 N/A
 N/A
 N/A
 1.5° ± 1.3
Thorax Rz
 0.3°
 1.4
 0.7°
 0.66
 0.55–0.77
 0.76
 0.66–0.85
 1.0° ± 0.8
Head Rz
 1.1°
 2.3
 1.2°
 0.66
 0.55–0.77
 0.75
 0.64–0.84
 1.9° ± 1.3
Pelvis Tx
 -3.6 mm
 7.1
 4.3 mm
 0.51
 0.39 – 0.64
 0.64
 0.51 – 0.76
 6.0 mm ± 4.3
Thorax Tx
 2.0 mm
 6.5
 2.6 mm
 0.72
 0.62 – 0.82
 0.84
 0.74 – 0.90
 4.2 mm ± 3.2
Head Tx
 -0.6 mm
 6.0
 3.4 mm
 0.54
 0.42 – 0.67
 0.67
 0.54 – 0.78
 5.2 mm ± 3.9
Pelvis Tz
 54.4 mm
 17.0
 5.9 mm
 0.80
 0.71 – 0.87
 0.88
 0.81 – 0.93
 8.4 mm ± 6.3
Thorax Tz
 3.6 mm
 9.8
 5.5 mm
 0.54
 0.41 – 0.68
 0.68
 0.52 – 0.81
 8.3 mm ± 6.0
Head Tz
 30.1 mm
 9.1
 4.6 mm
 0.64
 0.52 – 0.75
 0.75
 0.64 – 0.84
 6.0 mm ± 4.6

* SD = Standard deviation

† SEM = Standard error of measurement = Math.

‡ ICC = Cross factor intra- or inter-examiner correlation coefficient

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

|| MADBO = Mean absolute differences between 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