Mean age disparity (years) | SD of disparity (years) | 95% CL | |
---|---|---|---|
Intra-observer variation | |||
Greulich and Pyle method | 0.14 | 1.16 | −2.46 to 2.18 |
Tanner and Whitehouse method | 0.01 | 0.71 | −1.41 to 1.43 |
Variation between methods | 0.38 | 0.95 | 2.28 to −1.52 |
For intra-observer variation, mean age disparity is reading 2 − reading 1
For variation between methods, mean age disparity is TW2 age − G & P age.
CL, confidence limits.