Table 3.

Multivariate and subgroup analysis assessing the association between SWL and the development of a new diagnosis of hypertension in index stone formers.

Adjustment	SWL HR*	95% CI	P-value
No adjustment	1.11	0.90, 1.37	0.33
Age, gender	1.03	0.84, 1.27	0.76
Age, gender, baseline obesity	1.03	0.84, 1.27	0.77
Subgroup	SWL HR*	95% CI	P-value
Male, Age < Median of 43 (N=1,351)	1.13	0.69, 1.84	0.63
Male, Age >=Median of 43 (N=1,307)	0.94	0.69, 1.29	0.71
Female, Age < Median of 35 (N=1,031)	1.10	0.57, 2.14	0.78
Female, Age >=Median of 35 (N=1,093)	1.19	0.79, 1.78	0.40

^*Estimate SWL hazard ratio for development of hypertension from Cox model with SWL analyzed as a time dependent covariate.