Table 1. Baseline Characteristics of Survey Responders and Nonresponders.
| Variable | No. (%) | P value | ||
|---|---|---|---|---|
| Nonresponders (n = 42 940) | Responders (n = 46 805) | Total (N = 89 745) | ||
| Age at enrollment, median (IQR), y | 62.0 (56.0-67.0) | 60.0 (55.0-64.0) | 61.0 (56.0-66.0) | <.001 |
| Hypertension | 13 625 (31.9) | 11 537 (24.7) | 25 162 (28.2) | <.001 |
| Diabetes | 2144 (5.0) | 1186 (2.5) | 3330 (3.7) | <.001 |
| Smoking | 19 966 (46.9) | 22 124 (47.5) | 42 090 (47.2) | .06 |
| Hyperlipidemia | 5371 (13.3) | 4513 (10.2) | 9884 (11.7) | <.001 |
| Race/ethnicity | ||||
| White | 31 273 (74.1) | 41 667 (90.0) | 72 940 (82.4) | <.001 |
| Black | 5853 (13.9) | 2402 (5.2) | 8255 (9.3) | |
| Hispanic | 3198 (7.6) | 1113 (2.4) | 4311 (4.9) | |
| Other | 1873 (4.4) | 1136 (2.5) | 3009 (3.4) | |
| Education | ||||
| High school or less | 11 324 (26.6) | 7811 (16.8) | 19 135 (21.5) | <.001 |
| Some college or more | 26 341 (61.9) | 34 852 (74.9) | 61 193 (68.7) | |
| Other | 4881 (11.5) | 3845 (8.3) | 8726 (9.8) | |
| Income, $ | ||||
| <20 000 | 7251 (18.4) | 3460 (7.8) | 10 711 (12.7) | <.001 |
| 20 000-74 000 | 25 462 (64.6) | 28 745 (64.5) | 54 207 (64.5) | |
| ≥75 000 | 6730 (17.1) | 12 365 (27.7) | 19 095 (22.7) | |
| BMI, median (IQR) | 27.4 (24.2-31.6) | 26.2 (23.4-30.0) | 26.8 (23.7-30.8) | <.001 |
| Parity | ||||
| No term pregnanciesa | 1420 (3.3) | 531 (1.1) | 1951 (2.2) | <.001 |
| 1 | 4391 (10.3) | 4384 (9.4) | 8775 (9.8) | |
| 2 | 11 884 (27.9) | 14 244 (30.6) | 26 128 (29.3) | |
| 3 | 11 005 (25.8) | 13 347 (28.6) | 24 352 (27.3) | |
| 4 | 6949 (16.3) | 7779 (16.7) | 14 728 (16.5) | |
| ≥5 | 7001 (16.4) | 6327 (13.6) | 13 328 (14.9) | |
| Breastfeeding | 22 874 (53.8) | 27 616 (59.3) | 50 490 (56.7) | <.001 |
| ASCVD | 2982 (6.9) | 3053 (6.5) | 6035 (6.7) | .01 |
| Age at ASCVD, median (IQR), y | 72.4 (67.0-77.4) | 71.7 (66.8-76.9) | 72.1 (66.9-77.1) | .09 |
Abbreviations: ASCVD, atherosclerotic cardiovascular disease; BMI, body mass index (calculated as weight in kilograms divided by height in meters squared); IQR, interquartile range.
a
Women with no term pregnancies had to be pregnant for at least 6 months to be eligible.