Table 1.
Population characteristics by categories of dietary zinc intake
| Variables | Zinc Intake, mg/d | ||||
|---|---|---|---|---|---|
| Total | < 8 | 8–14 | > 14 | p | |
| 4315 | 1864 | 1652 | 799 | ||
| Age(year), n (%) | 0.022 | ||||
| < 40 | 2298 (53.3) | 942 (50.5) | 907 (54.9) | 449 (56.2) | |
| 40–50 | 1403 (32.5) | 630 (33.8) | 524 (31.7) | 249 (31.2) | |
| > 50 | 614 (14.2) | 292 (15.7) | 221 (13.4) | 101 (12.6) | |
| BMI(Kg/m2), n (%) | 0.004 | ||||
| < 25 | 1544 (36.0) | 625 (33.9) | 633 (38.5) | 286 (36) | |
| 25–30 | 1153 (26.9) | 545 (29.5) | 415 (25.2) | 193 (24.3) | |
| > 30 | 1589 (37.1) | 676 (36.6) | 597 (36.3) | 316 (39.7) | |
| Race/Ethnicity, n (%) | < 0.001 | ||||
| Mexican American | 973 (22.5) | 410 (22) | 396 (24) | 167 (20.9) | |
| Other Race | 381 ( 8.8) | 173 (9.3) | 153 (9.3) | 55 (6.9) | |
| Non-Hispanic White | 2001 (46.4) | 812 (43.6) | 793 (48) | 396 (49.6) | |
| Non-Hispanic Black | 960 (22.2) | 469 (25.2) | 310 (18.8) | 181 (22.7) | |
| Family Income, n (%) | 0.008 | ||||
| Low | 1134 (28.1) | 530 (30.5) | 406 (26.1) | 198 (26.4) | |
| Medium | 1475 (36.5) | 637 (36.7) | 577 (37.1) | 261 (34.8) | |
| High | 1433 (35.5) | 570 (32.8) | 572 (36.8) | 291 (38.8) | |
| Education Level(year), n (%) | 0.002 | ||||
| < 9 | 369 ( 8.6) | 179 (9.6) | 141 (8.5) | 49 (6.1) | |
| 9–12 | 1647 (38.2) | 748 (40.2) | 601 (36.4) | 298 (37.3) | |
| > 12 | 2295 (53.2) | 935 (50.2) | 909 (55.1) | 451 (56.5) | |
| Marital Status, n (%) | 0.031 | ||||
| Living with a partner | 2531 (60.2) | 1046 (58) | 992 (61.4) | 493 (62.8) | |
| Living alone | 1675 (39.8) | 759 (42) | 624 (38.6) | 292 (37.2) | |
| Smoking status, n (%) | 0.958 | ||||
| Yes | 1699 (39.4) | 736 (39.5) | 648 (39.2) | 315 (39.4) | |
| No | 2613 (60.6) | 1127 (60.5) | 1003 (60.7) | 483 (60.5) | |
| Vigorous activity, n (%) | 0.018 | ||||
| Yes | 1470 (34.1) | 597 (32) | 582 (35.2) | 291 (36.4) | |
| No | 2761 (64.0) | 1222 (65.6) | 1049 (63.5) | 490 (61.3) | |
| Unable to do activity | 82 ( 1.9) | 44 (2.4) | 20 (1.2) | 18 (2.3) | |
| Moderate activity, n (%) | < 0.001 | ||||
| Yes | 2257 (52.3) | 919 (49.3) | 872 (52.8) | 466 (58.3) | |
| No | 1995 (46.2) | 908 (48.7) | 767 (46.4) | 320 (40.1) | |
| Unable to do activity | 61 (1.4) | 36 (1.9) | 12 (0.7) | 13 (1.6) | |
| Dietary supplements taken, n (%) | < 0.001 | ||||
| Yes | 2030 (47.1) | 803 (43.1) | 795 (48.1) | 432 (54.1) | |
| No | 2281 (52.9) | 1059 (56.8) | 855 (51.8) | 367 (45.9) | |