Table 1.

Intraclass correlation coefficients (ICCs) and confidence intervals for manual versus computer-assisted measures of angles and bone lengths from patterns drawn using AutoCAD® software. A total of 105 manual measures (3 sets of 5 patterns from each of the 7 readers) and 105 computer-generated measures for each of the angles and bone lengths were evaluated in the reliability analysis.

	Intraclass Correlation Coefficient (95% Confidence Interval)
Variable	Manual Measurement	Computer Measures
HKA	0.993 (0.987, 0.996)	0.999 (0.999, 1.000)
CH	0.990 (0.983, 0.995)	0.992 (0.986, 0.996)
PA	0.906 (0.843, 0.948)	0.980 (0.964, 0.989)
CP	0.991 (0.985, 0.995)	0.995 (0.990. 0.997)
FM–FS	0.820 (0.710, 0.897)	0.977 (0.959, 0.988)
FM–TS	0.995 (0.991, 0.997)	0.999 (0.997, 0.999)
FS-TM	0.984 (0.972, 0.991)	0.999 (0.999, 1.000)
FS–TS	0.982 (0.969, 0.990)	0.998 (0.996, 0.999)
Femoral length	0.952 (0.918, 0.974)	0.997 (0.995, 0.998)
Tibial length	0.865 (0.779, 0.924)	0.982 (0.968, 0.990)
Apparent leg length	0.969 (0.946, 0.983)	0.999 (0.998, 0.999)

HKA: hip-knee-ankle angle

CH: condylar-hip angle

PA: plateau-ankle angle

CP: condylar-plateau angle

FM-FS: femoral mechanical axis–femoral shaft axis angle

FM-TS: femoral mechanical axis–tibial shaft axis angle

FS-TM: femoral shaft axis–tibial mechanical axis angle

FS-TS: femoral shaft axis–tibial shaft axis angle