Table 1.
The demographic characteristics of the subjects
| Characteristic | All participants |
Propensity score matching |
Inverse probability of treatment weighting |
||||||
|---|---|---|---|---|---|---|---|---|---|
| Controls (n = 766) | NAFLD cases (n = 772) | P-value | Controls (n = 679) | NAFLD cases (n = 679) | P-value | Controls (n = 1,537) | NAFLD cases (n = 1,539) | P-value | |
| Source | 0.964 | 0.126 | 0.998 | ||||||
| Nanping | 232 (30.3) | 233 (30.2) | 221 (32.5) | 195 (28.7) | 472 (30.7) | 473 (30.7) | |||
| Xiehe | 534 (69.7) | 539 (69.8) | 458 (67.5) | 484 (71.3) | 1,065 (69.3) | 1,066 (69.3) | |||
| Sex | 0.100 | 1.000 | 0.854 | ||||||
| Male | 579 (75.6) | 555 (71.9) | 496 (73.0) | 496 (73.0) | 1,140 (74.2) | 1,137 (73.9) | |||
| Female | 187 (24.4) | 217 (28.1) | 183 (27.0) | 183 (27.0) | 397 (25.8) | 402 (26.1) | |||
| Age (years) | 0.685 | 0.575 | 0.999 | ||||||
| <40 | 281 (36.7) | 269 (34.8) | 234 (34.5) | 252 (37.1) | 549 (35.7) | 549 (35.7) | |||
| 40–60 | 394 (51.4) | 414 (53.7) | 367 (54.0) | 355 (52.3) | 806 (52.5) | 809 (52.5) | |||
| ≥60 | 91 (11.9) | 89 (11.5) | 78 (11.5) | 72 (10.6) | 181 (11.8) | 181 (11.8) | |||
| Marital status | 0.058 | 0.523 | 0.968 | ||||||
| Married | 676 (88.3) | 704 (91.2) | 609 (89.7) | 616 (90.7) | 159 (10.4) | 160 (10.4) | |||
| Others | 90 (11.7) | 68 (8.8) | 70 (10.3) | 63 (9.3) | 1,377 (89.6) | 1,379 (89.6) | |||
| Education | 0.295 | 0.120 | 0.038 | ||||||
| Primary school or below | 484 (63.2) | 515 (66.7) | 427 (62.9) | 461 (67.9) | 977 (63.6) | 1,003 (65.2) | |||
| Middle school | 141 (18.4) | 122 (15.8) | 119 (17.5) | 96 (14.1) | 289 (18.8) | 238 (15.5) | |||
| University or above | 141 (18.4) | 135 (17.5) | 133 (19.6) | 122 (18.0) | 271 (17.6) | 298 (19.3) | |||
| Smoking | 0.002 | 0.233 | 0.923 | ||||||
| No | 573 (74.8) | 521 (67.5) | 490 (72.2) | 470 (69.2) | 1,096 (71.3) | 1,095 (71.2) | |||
| Yes | 193 (25.2) | 251 (32.5) | 189 (27.8) | 209 (30.8) | 441 (28.7) | 444 (28.8) | |||
| Drinking | 0.023 | 1.000 | 0.959 | ||||||
| No | 553 (72.2) | 516 (66.8) | 477 (70.3) | 477 (70.3) | 1,061 (69.0) | 1,063 (69.1) | |||
| Yes | 213 (27.8) | 256 (33.2) | 202 (29.7) | 202 (29.7) | 476 (31.0) | 475 (30.9) | |||
| Drinking tea | 0.209 | 0.162 | 0.919 | ||||||
| No | 529 (69.1) | 510 (66.1) | 451 (66.4) | 475 (70.0) | 1,032 (67.1) | 1,036 (67.3) | |||
| Yes | 237 (30.9) | 262 (33.9) | 228 (33.6) | 204 (30.0) | 505 (32.9) | 503 (32.7) | |||
NAFLD, non-alcoholic fatty liver disease.