Table 2.

Fixed Effects Parameter Estimates for GB Stage Model

	Parameter	Estimate	SE	DF	t-value	p-value
Tempo
	Intercept	1.133	0.135	222	8.38	<0.0001
	Diagnosis	0.058	0.124	222	0.47	0.642
	BMI	0.006	0.002	222	3.33	0.001
	Sex	−0.411	0.124	222	−3.31	0.001
Timing
	Intercept	13.591	0.188	222	72.09	<0.0001
	Diagnosis	−0.425	0.157	222	−2.71	0.007
	BMI	−0.008	0.002	222	−3.56	0.001
	Sex	−0.171	0.164	222	−1.04	0.298

Note: Tempo parameters control the rate of progression through puberty, with positive values being faster. Timing parameters control the age at which an individual reaches stage 3 in years. SE, standard error; DF, degrees of freedom; BMI, body mass index