Table 1.

Clinical information of the participants.

Characteristics	NC group (n=9)	NL group (n=19)	P
Age, years	44.0 ± 14.8	52.3 ± 13.9	0.160
Gender (% female)	44.4%	31.6%	0.507
BMI, kg/m2	22.2 ± 3.2	23.5 ± 3.7	0.369
Smoke (n,%)	55.6%	47.4%	0.686
Drink (n,%)	55.6%	57.9%	0.907
Uric acid	339.3 ± 65.9	387.95 ± 82.0	0.133
Urine PH	6.9 ± 0.5	6.9 ± 0.4	0.976
Stone size (mm)	NA	14.1 ± 6.3	NA

NA, not applicable.