Bone-specific Greulich-Pyle and Tanner-Whitehouse assessments of skeletal age were made of 2,009 roentgenograms of 62 boys and 82 girls studied semilongitudinally from two to fourteen years. The median G-P 1 skeletal ages were similar to the chronologic ages as were the median G-P 2 skeletal ages. The median Tanner-Whitehouse skeletal ages were markedly greater than the corresponding chronological ages especially from six to nine years in the boys and from four to eight years in the girls.
No takes yet. Share an insight, caveat, or question.
Roche et al. (1971) studied this question.