Table 1.
Characteristics of the study population based on suicidal ideation
| Characteristic | Total (n = 26224) | Non-suicidal ideation (n = 25254) | Suicidal ideation (n = 970) | P value |
|---|---|---|---|---|
| Age | 49.6 ± 17.7 | 49.6 ± 17.7 | 49.6 ± 16.9 | 0.911 |
| Gender, % | < 0.001 | |||
| Male | 13,165 (50.2) | 12,732 (50.4) | 433 (44.6) | |
| Female | 13,059 (49.8) | 12,522 (49.6) | 537 (55.4) | |
| Race, % | < 0.001 | |||
| Mexican American | 4218 (16.1) | 4036 (16) | 182 (18.8) | |
| Other Hispanic | 2520 (9.6) | 2364 (9.4) | 156 (16.1) | |
| Non-Hispanic White | 11,857 (45.2) | 11,469 (45.4) | 388 (40) | |
| Non-Hispanic Black | 5336 (20.3) | 5156 (20.4) | 180 (18.6) | |
| Other Race | 2293 (8.7) | 2229 (8.8) | 64 (6.6) | |
| Education level, % | < 0.001 | |||
| Less than high school | 6460 (24.6) | 6081 (24.1) | 379 (39.1) | |
| High school or above | 19,752 (75.4) | 19,162 (75.9) | 590 (60.9) | |
| Marital, % | < 0.001 | |||
| Married/living with partner | 16,620 (63.4) | 16,122 (63.8) | 498 (51.3) | |
| Separated/divorced/widowed | 4914 (18.7) | 4662 (18.5) | 252 (26) | |
| Never married | 4690 (17.9) | 4470 (17.7) | 220 (22.7) | |
| Physical activity, % | 0.595 | |||
| Low | 21,765 (83.0) | 20,935 (82.9) | 830 (83.9) | |
| High | 4459 (17.0) | 4319 (17.1) | 140 (16.1) | |
| Alcohol status, n% | 0.194 | |||
| Current or ever, % | 18,883 (72.1) | 18,203 (72.2) | 680 (70.2) | |
| Never | 7312 (27.9) | 7024 (27.8) | 288 (29.8) | |
| Smoking status, n% | < 0.001 | |||
| Current or ever, % | 11,987 (45.7) | 11,445 (45.3) | 542 (55.9) | |
| Never | 16,792 (64.1) | 16,251 (64.4) | 541 (56) | |
| Hypertension, % | < 0.001 | |||
| Yes | 9397 (35.9) | 8972 (35.6) | 425 (44) | |
| No | 16,977 (64.9) | 16,435 (65.2) | 542 (56.9) | |
| Diabetes, % | < 0.001 | |||
| Yes | 3825 (14.6) | 3621 (14.3) | 204 (21) | |
| No | 22,384 (85.4) | 21,618 (85.7) | 766 (79) | |
| Hyperlipidemia, % | 0.005 | |||
| Yes | 18,795 (71.7) | 18,061 (71.5) | 734 (75.7) | |
| No | 7429 (28.3) | 7193 (28.5) | 236 (24.3) | |
| CHD, % | < 0.001 | |||
| Yes | 1065 (4.1) | 996 (3.9) | 69 (7.1) | |
| No | 25,159 (95.9) | 24,258 (96.1) | 901 (92.9) | |
| Stroke | < 0.001 | |||
| Yes | 918 (3.5) | 842 (3.3) | 76 (7.8) | |
| No | 25,306 (96.5) | 24,412 (96.7) | 894 (92.2) | |
| Cancer, % | 0.068 | |||
| Yes | 2479 (9.5) | 2371 (9.4) | 108 (11.1) | |
| No | 23,745 (90.5) | 22,883 (90.6) | 862 (88.9) | |
| Depression disorder, % | < 0.001 | |||
| Yes | 2196 (8.4) | 1643 (6.5) | 553 (57) | |
| No | 24,028 (91.6) | 23,611 (93.5) | 417 (43) | |
| Body mass index, kg/m2 | 29.2 ± 6.9 | 29.1 ± 6.8 | 30.0 ± 7.7 | < 0.001 |
| Albumin, g/dl | 42.6 ± 3.3 | 42.6 ± 3.3 | 42.1 ± 3.7 | < 0.001 |
| Creatinine, umol/L | 80.7 ± 39.6 | 80.7 ± 39.8 | 79.9 ± 35.2 | 0.514 |
| PIR | 2.55 ± 1.63 | 2.59 ± 1.63 | 1.73 ± 1.39 | < 0.001 |
| CRP | 0.20 (0.08, 0.46) | 0.20 (0.08, 0.46) | 0.23 (0.08, 0.62) | 0.018 |
| Dietary niacin intake, mg/d | 25.2 ± 15.4 | 25.2 ± 15.3 | 23.7 ± 16.2 | < 0.001 |
CHD coronary heart disease, PIR family income-to-poverty ratio, WBC white blood cell
Values are mean±SD or number (%), P < 0.05 was deemed significant