Table 1.
Demographic characteristics of study population, overall and stratified by US region
| Characteristic | All N = 206,474 |
Midwest N = 36,169 (17.5%) |
Northeast N = 57,628 (27.9%) |
South N = 89,066 (43.1%) |
West N = 23,302 (11.3%) |
Other regionsa N = 309 (0.1%) |
|---|---|---|---|---|---|---|
| Age (years) | ||||||
| Mean (SD) | 47.9 (12.7) | 45.9 (12.7) | 48.9 (12.6) | 48.0 (12.6) | 48.3 (12.7) | 49.5 (11.7) |
| Median | 50 | 47 | 51 | 50 | 50 | 50 |
| Age group, N % | ||||||
| 18–44 years | 75,678 (36.7) | 15,441 (42.7) | 19,237 (33.4) | 32,487 (36.5) | 8420 (36.1) | 93 (30.1) |
| 45–54 years | 61,924 (30.0) | 10,559 (29.2) | 17,303 (30.0) | 27,013 (30.3) | 6943 (29.8) | 106 (34.3) |
| 55–64 years | 51,920 (25.2) | 8070 (22.3) | 15,722 (27.3) | 22,254 (25.0) | 5791 (24.9) | 83 (26.9) |
| ≥ 65 years | 16,952 (8.2) | 2099 (5.8) | 5366 (9.3) | 7312 (8.2) | 2148 (9.2) | 27 (8.7) |
| Gender, N % | ||||||
| Female | 54,938 (26.6) | 7903 (21.9) | 17,638 (30.6) | 25,845 (29.0) | 3431 (14.7) | 121 (39.2) |
| Male | 151,536 (73.4) | 28,266 (78.2) | 39,990 (69.4) | 63,221 (71.0) | 19,871 (85.3) | 188 (60.8) |
| Race/ethnicity, N % | ||||||
| Caucasian | 61,829 (30.0) | 12,798 (35.4) | 14,450 (25.1) | 25,272 (28.4) | 9307 (39.9) | 2 (0.7) |
| Black/African American | 54,849 (26.6) | 10,453 (28.9) | 14,266 (24.8) | 29,164 (32.7) | 966 (4.2) | 0 (0) |
| Hispanic | 21,813 (10.6) | 1676 (4.6) | 9092 (15.8) | 8413 (9.5) | 2631 (11.3) | 1 (0.3) |
| Asian | 1256 (0.6) | 167 (0.5) | 385 (0.7) | 411 (0.5) | 293 (1.3) | 0 (0) |
| Unknown/other | 66,727 (32.3) | 11,075 (30.6) | 19,435 (33.7) | 25,806 (29.0) | 10,105 (43.4) | 306 (99.0) |
| Insurance type, N % | ||||||
| Commercial | 78,996 (38.3) | 15,227 (42.1) | 17,683 (30.7) | 38,264 (43.0) | 7776 (33.4) | 46 (14.9) |
| Medicaid | 63,020 (30.5) | 12,139 (33.6) | 22,683 (39.4) | 20,685 (23.2) | 7271 (31.2) | 242 (78.3) |
| Medicare | 40,927 (19.8) | 6224 (17.2) | 10,201 (17.7) | 19,833 (22.3) | 4655 (20.0) | 14 (4.5) |
| Other/unspecified | 23,531 (11.4) | 2579 (7.1) | 7061 (12.3) | 10,284 (11.6) | 3600 (15.4) | 7 (2.3) |
SD standard deviation
a“Other regions” included US territories or military bases not included in the US census regions, etc.