Table 1 Descriptive statistics of the study population in depression among the training cohort, NHANES, 2007–2010
From: Assessing the depression risk in the U.S. adults using nomogram
Factors | Levels | Overall (n = 6015), % | Depression (n = 841), % | Non-depression (n = 5174), % | P value |
|---|---|---|---|---|---|
Gender | Male | 2991 (49.7) | 344 (40.9) | 2647 (51.2) | < 0.001 |
| Â | Female | 3024 (50.3) | 497 (59.1) | 2527 (48.8) | Â |
Age | 20–29 | 1464 (24.3) | 169 (20.1) | 1295 (25.0) | < 0.001 |
|  | 30–39 | 1511 (25.1) | 191 (22.7) | 1320 (25.5) |  |
|  | 40–49 | 1563 (26.0) | 238 (28.3) | 1325 (25.6) |  |
|  | 50–59 | 1477 (24.6) | 243 (28.9) | 1234 (23.9) |  |
Race | Hispanic | 1801 (29.9) | 237 (28.2) | 1564 (30.2) | 0.033 |
| Â | Non-Hispanic White | 2800 (46.6) | 374 (44.5) | 2426 (46.9) | Â |
| Â | African American | 1148 (19.1) | 191 (22.7) | 957 (18.5) | Â |
| Â | Other | 266 (4.4) | 39 (4.6) | 227 (4.4) | Â |
Marital status | Married | 3027 (50.3) | 319 (37.9) | 2708 (52.3) | < 0.001 |
Cohabiting couple | 637 (10.6) | 90 (10.7) | 547 (10.6) | Â | |
| Â | Unmarried | 1360 (22.6) | 216 (25.7) | 1144 (22.1) | Â |
| Â | Wid/Div/Sep | 991 (16.5) | 216 (25.7) | 775 (15.0) | Â |
Education | < high school | 1496 (24.9) | 308 (36.6) | 1188 (23.0) | < 0.001 |
| Â | <= college | 3246 (54.0) | 449 (53.4) | 2797 (54.1) | Â |
| Â | > college | 1273 (21.2) | 84 (10.0) | 1189 (23.0) | Â |
Income | <= 4 | 1881 (31.3) | 399 (47.4) | 1482 (28.6) | < 0.001 |
| Â | <= 8 | 2349 (39.1) | 322 (38.3) | 2027 (39.2) | Â |
| Â | <= 12 | 1785 (29.7) | 120 (14.3) | 1665 (32.2) | Â |
Sleep time | <  6 h | 982 (16.3) | 241 (28.7) | 741 (14.3) | < 0.001 |
|  | <= 8 h | 4673 (77.7) | 527 (62.7) | 4146 (80.1) |  |
|  | >  8 h | 360 (6.0) | 73 (8.7) | 287 (5.5) |  |
Anxious day | Never | 2269 (37.7) | 72 (8.6) | 2197 (42.5) | < 0.001 |
|  | <= 7 days | 2117 (35.2) | 177 (21.0) | 1940 (37.5) |  |
|  | <= 14 days | 470 (7.8) | 76 (9.0) | 394 (7.6) |  |
|  | <= 21 days | 429 (7.1) | 129 (15.3) | 300 (5.8) |  |
|  | >  21 days | 730 (12.1) | 387 (46.0) | 343 (6.6) |  |