Table 1.

Characteristics of urinary stones of according to gender of 1520 patients.

Characteristic	Overall	Male	Female
Age (year)
Mean ± SD	46.88 ± 13.84	45.34 ± 13.76	48.25 ± 13.41
1–10	22	16	6
11–20	20	15	5
21–30	164	122	42
31–40	281	206	75
41–50	399	276	123
51–60	413	265	148
61–70	171	106	65
71–80	46	27	19
81–90	4	3	1
Localization, n
Kidney	923	605	318
Ureter	551	396	155
Bladder	42	32	10
Urethra	4	3	1
Region, n
North of the linea	1151	801	350
South of the linea	369	235	134
Urinary infection, n
Yes	348	200	148
No	1172	836	336

^aThe Qinling Mountain-Huaihe River Line.