Table 2. Patient characteristics for comorbidity matched sample.

Characteristic	Stone formers (n=140)	Non-stone formers (n=140)	P value
Female, n [%]	73 [52]	73 [52]	1
Male, n [%]	67 [48]	67 [48]	1
Age at CT	46.2±1	49.5±0.8	0.011
Body mass index	29±0.7	27.9±0.3	0.172
Diabetes mellitus, n [%]	1 [1]	0	1
Hypertension, n [%]	22 [16]	13 [9]	0.148
Hyperlipidemia, n [%]	26 [19]	27 [19]	1
Smoking, n [%]	29 [21]	30 [21]	1
Hyperparathyroidism	1	0	0.316