Table 1.
The baseline data of nephrolithiasis and controls
| Variables | Case n = 830 (%) | Controls n = 711 (%) | P |
|---|---|---|---|
| Age (years) | 48.03 ± 12.43 | 48.47 ± 12.10 | .481 |
| Sex | .193 | ||
| Male | 478 (57.6) | 386 (54.3) | |
| Female | 352 (42.4) | 325 (45.7) | |
| BMI | 22.79 ± 3.52 | 23.53 ± 3.38 | .000 |
| ≤24 | 20.85 ± 2.05 | 21.10 ± 1.95 | .070 |
| >24 | 26.76 ± 2.38 | 26.57 ± 2.09 | .328 |
| Hypertension | |||
| YES | 118 (14.2) | 74 (10.4) | .024 |
| No | 712 (85.8) | 637 (89.6) | |
| Diabetes | .665 | ||
| YES | 19 (2.3) | 14 (2.0) | |
| No | 811 (97.7) | 697 (98.0) | |
| Smoking status | n = 798 (%) | n = 681 (%) | .000 |
| Ever | 265 (33.2) | 110 (16.2) | |
| Never | 533 (66.8) | 571 (83.8) | |
| Drinking status | n = 790 (%) | n = 431 (%) | .000 |
| Ever | 310 (39.2) | 236 (54.8) | |
| Never | 480 (60.8) | 195 (45.2) | |
| Crea (μmoI/L) | n = 826 | n = 613 | .000 |
| 112.16 ± 139.14 | 78.99 ± 15.20 | ||
| UA (μmoI/L) | n = 826 | n = 615 | .000 |
| 349.99 ± 122.67 | 381.63 ± 96.44 | ||
| BUN (mmol/L) | n = 769 | n = 114 | |
| 6.04 ± 5.03 | 5.63 ± 7.31 | .446 |
P < .05 are marked in bold.