Table 2.

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

			Timing relative to PHV (yrs)
Stage	Samples (n)	Mean	95% confidence interval	Range
Female patients
0	56	-5.18	-5.52 to -4.84	-7.57 to -2.23
1	40	-2.82	-3.18 to -2.46	-5.15 to -0.61
2	48	-1.79	-2.06 to -1.51	-3.78 to 0.04
3	39	-0.51	-0.78 to -0.23	-1.99 to 1.05
4	88	0.71	0.50 to 0.93	-2.18 to 2.93
5*	26	4.10	3.53 to 4.67	1.55 to 6.89
Male patients
0	46	-4.78	-5.25 to -4.31	-8.55 to -1.69
1	27	-2.29	-2.71 to -1.87	-4.66 to -0.57
2	39	-1.80	-2.12 to -1.48	-4.55 to 0.31
3	40	-0.67	-0.96 to -0.39	-3.50 to 0.96
4	91	0.72	0.52 to 0.92	-1.76 to 2.43
5*	9	3.32	2.66 to 3.98	2.12 to 5.08

^*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