Number of paired measurements (n) | Mean of paired measurements | Difference between first and second measurement Mean (95% CI) | P values | Technical error of measurement (CV) | |
Upper arm length (cm) | 25 | 27.2 | 0.5 (−1.3 to 0.3) | 0.2 | 1.37 (5.03) |
Tibial length (cm) | 27 | 29.4 | 0.2 (−0.7 to 1.1) | 0.6 | 1.57 (5.35) |
Tibial length (cm) <12 years | 17 | 26.8 | −0.23 (−0.97 to 0.51) | 0.26 | 1.00 (3.74) |
Knee height (cm) | 27 | 37.3 | 0.1 (−0.6 to 0.4) | 0.7 | 0.81 (2.18) |
Knee height (cm) <12 years | 17 | 33.6 | −0.23 (−0.90 to 0.45) | 0.24 | 0.91 (2.72) |
Supine length (cm) | 25 | 126.0 | 0.3 (−1.1 to 1.8) | 0.6 | 2.47 (1.96) |
Supine length (cm) <12 years | 15 | 116.4 | −0.058 (−1.19 to 1.08) | 0.46 | 1.39 (1.20) |
TEM=√∑d2⁄2 n, where d is the difference between two measurements and n isthe number of measurements. CV: 100xTEM/mean of measurements taken, expressed as a percentage.