Table 3.

Fixed Effects Parameter Estimates for the PH Stage Model

	Parameter	Estimate	SE	DF	t-value	p-value
Tempo
	Intercept	1.867	0.166	223	11.22	<0.0001
	Diagnosis	0.080	0.123	223	0.65	0.517
	BMI	0.001	0.002	223	0.64	0.523
	Sex	−0.892	0.135	223	−6.62	<0.0001
Timing
	Intercept	13.702	0.172	223	79.53	<0.0001
	Diagnosis	−0.335	0.145	223	−2.31	0.022
	BMI	−0.010	0.002	223	−4.71	<0.001
	Sex	−0.482	0.150	223	−3.21	0.002

Note: Tempo parameters control the rate of progression through puberty, with positive values being faster. Timing parameters control the shift of the curve along the X-axis in years. SE, standard error; DF, degrees of freedom; BMI, body mass index