Table 1.

Ossification of the proximal phalanges with respect to peak height velocity (PHV)

			Timing relative to PHV (yrs)
Stage	Samples (n)	Mean	95% confidence interval	Range
0	102	-5.00	-5.28 to -4.72	-8.55 to -1.69
1	67	-2.61	-2.88 to -2.33	-5.15 to -0.57
2	87	-1.79	-2.00 to -1.58	-4.55 to 0.31
3	79	-0.59	-0.79 to 0.40	-3.50 to 1.05
4	179	0.72	0.57 to 0.86	-2.18 to 2.93
5*	35	3.90	3.43 to 4.36	1.55 to 6.89

^*first appearance of stage 5; there were 179 metaphysis, epiphysis hook skeletal assessment stage 5 radiographs that were made after the first appearance of stage 5 and were not used for calculations of the first appearance of stage 5