Table 5. Regression output for spheno-occipital synchondrosis closure in relation to age.

	Coefficient B	Standard Error	95% CI
Males
Stage 0 (Intercept)	11.06*	0.13	10.80–11.32
Stage 1	1.78*	0.26	1.35–2.39
Stage 2	3.87*	0.26	2.85–3.89
Stage 3	5.34*	0.20	4.95–5.72
Females
Stage 0 (Intercept)	9.74*	0.15	9.45–10.04
Stage 1	1.91 *	0.30	1.32–2.51
Stage 2	3.50*	0.28	2.94–4.06
Stage 3	5.49*	0.19	5.12–5.87

*P < 0.01 (significant difference between stages within each group)