Table 4.

Final multivariable Cox regression model: correlates of incident fracture, including measures of physical activity

Model n=290 (483 observations)	HR	95% CI	P Value
Age ≥15 versus <15 years	0.39	(0.10, 1.49)	0.17
Male	0.40	(0.12, 1.36)	0.14
Age X male interaction	3.89	(0.72, 21.04)	0.12
Tanner stages 4–5 versus 1–3	1.42	(0.58, 3.52)	0.45
Height Z-score	1.17	(0.89, 1.55)	0.25
Baseline eGFR<60 ml/min per 1.73 m2	2.46	(0.71, 8.50)	0.15
Baseline walking difficulty	1.07	(0.15, 7.69)	0.95
On phosphate binder	0.12	(0.01, 0.91)	0.04
Average lnPTHa	1.19	(0.68, 2.06)	0.54
>1 sports team in past 12 months	4.87	(2.21, 10.75)	<0.001

^aPTH natural log transformed.