Table 3. Demographic and lifestyle risk factors in recurrent stone formers (RSF) and healthy subjects (HS).
| RSF n (%) | HS n (%) | p | |
|---|---|---|---|
| Age group (yrs): | |||
| ≤60 | 47 (83.93) | 67 (85.90) | |
| >60 | 9 (16.07) | 11 (14.10) | 0.752 |
| Body mass index: | |||
| ≤24.9 | 13 (23.22) | 27 (34.62) | |
| 25.0-29.9 | 32 (57.14) | 34 (43.59) | |
| ≤30.0 | 11 (19.64) | 17 (21.79) | 0.258 |
| Smoking: | |||
| Current smoker | 16 (28.57) | 28 (35.90) | |
| Past smoker | 13 (23.22) | 18 (23.08) | |
| Never smoked | 27 (48.21) | 32 (41.03) | 0.633 |
| Current physical activity: | |||
| Very active | 3 (5.36) | 10 (12.82) | |
| Moderately active | 39 (69.64) | 49 (62.82) | |
| Less active | 14 (25.00) | 19 (24.36) | 0.349 |
| Previous sports activity: | |||
| Yes | 27 (48.21) | 30 (38.46) | |
| No | 29 (51.79) | 48 (61.54) | 0.260 |
| Milk consumption: | |||
| Never/less than once a day | 31 (55.36) | 24 (30.77) | |
| Once a day | 17 (30.35) | 37 (47.43) | |
| More than once a day | 8 (14.29) | 17 (21.79) | 0.017 |
| Educational level: | |||
| Elementary school | 10 (17.86) | 14 (17.95) | |
| High school | 29 (51.79) | 31 (39.74) | |
| University | 17 (30.35) | 33 (42.31) | 0.316 |
| Total | 56 (100.00) | 78 (100.00) | |
χ2-test