Table 1 The distribution of the demographic characteristics of combined set
From: Association of functional genetic variants in TFF1 and nephrolithiasis risk in a Chinese population
Variables | Cases, n = 537 | Controls, n = 711 | P-valuea |
|---|---|---|---|
Mean age ± SD, years | 48.0 ± 13.2 | 46.1 ± 9.4 | 0.007 |
≤ 46, n (%) | 243 (45.3) | 243 (53.0) | |
> 46, n (%) | 294 (54.7) | 218 (47.0) | |
Gender, n (%) | 0.656 | ||
Male | 363 (67.7) | 473 (66.5) | |
Female | 173 (32.3) | 238 (33.5) | |
Body mass index, n (%) | 0.113 | ||
≤ 24 | 231 (45.5) | 356 (50.1) | |
> 24 | 277 (54.5) | 355 (49.9) | |
Hypertension, n (%) | < 0.001 | ||
Yes | 144 (27.8) | 130 (18.3) | |
No | 374 (72.2) | 580 (81.7) | |
Diabetes, n (%) | 0.934 | ||
Yes | 30 (5.8) | 42 (5.9) | |
No | 487 (94.2) | 668 (94.1) | |
Smoking status, n (%) | < 0.001 | ||
Ever | 221 (41.5) | 215 (30.3) | |
Never | 312 (58.5) | 495 (69.7) | |
Drinking status, n (%) | 0.996 | ||
Ever | 188 (35.3) | 251 (35.4) | |
Never | 344 (64.7) | 459 (64.6) |