Intra- and interobserver reliability analysis of pediatric lower limb parameters on digital long leg radiographs

Table 2 Lower limb measurement parameters (N = 144)

Measures	Observer one		Observer two		p Value
Measures	Mean ± SD (range)	Median (25 – 75 percentiles)	Mean ± SD (range)	Median (25 – 75 percentiles)	p Value
MFA (°)		− 2 (− 5 to 0)		− 3 (− 5 to − 1)	p < 0.001
MAD (mm)	− 8.69 ± 11.17 (− 38 to 22)		-9.01 ± 10.60 (− 37 to 22)		p = 0.013
mLPFA (°)		88 (85–91)		88 (85–92)	p = 0.173
mLDFA (°)		86 (84–89)		86 (84–89)	p < 0.001
mMPTA (°)		90 (89–92)		90 (89–91)	p < 0.001
mLDTA (°)		87 (84–89)		87 (85–89)	p < 0.001
JLCA (°)		2 (1–2)		1 (1–2)	p < 0.001
length of femur (mm)	474.24 ± 36.58 (387–572)		474.20 ± 36.28 (390–570)		p = 0.067
length of tibia (mm)		379.5 (359–402)		378 (358–401)	p < 0.001

Table 2 shows the mean measures from both analyses of both observers (SD = standard deviation) and the median with 25–75 percentiles
MFA Mechanical Femorotibial Angle; MAD Mechanical Axis Deviation; negative values of MFA and MAD show valgus malalignment; mLPFA mechanical Lateral Proximal Femur Angle; mLDFA mechanical Lateral Distal Femur Angle; mMPTA mechanical Medial Proximal Tibia Angle; mLDTA mechanical Lateral Distal Tibia Angle; JLCA Joint Line Convergence Angle, length of the femur and tibia. Parametric values: MAD and femur length; nonparametric values: MFA, mLPFA, mLDFA, mMPTA, mLDTA, JLCA and tibia length.

ISSN: 1749-799X