Table 1. Baseline characteristics by physical activity level.
| Physical Activity Level | |||
| Active | Moderately active | Inactive | |
| ≥3.0 METs/day | 1.5–2.9 METs/day | <1.5 METs/day | |
| Characteristica | N = 91,155 | N = 86,588 | N = 170,582 |
| Age (years), mean (SD) | 41.1 (19.8) | 46.8 (19.0) | 50.3 (19.3) |
| Sex (male) | 48,136 (52.8%) | 39,038 (45.1%) | 71,701 (42.0%) |
| Rural residence | |||
| No | 70,585 (77.4%) | 67,438 (77.9%) | 131,910 (77.3%) |
| Yes | 20,001 (21.9%) | 18,596 (21.5%) | 37,667 (22.1%) |
| Income quintile | |||
| 1 (lowest) | 15,891 (17.4%) | 15,129 (17.5%) | 36,289 (21.3%) |
| 2 | 17,321 (19.0%) | 16,815 (19.4%) | 35,671 (20.9%) |
| 3 | 18,457 (20.2%) | 17,677 (20.4%) | 34,487 (20.2%) |
| 4 | 18,762 (20.6%) | 17,980 (20.8%) | 32,810 (19.2%) |
| 5 (highest) | 19,912 (21.8%) | 18,249 (21.1%) | 29,947 (17.6%) |
| University education | |||
| No | 51,650 (56.7%) | 44,922 (51.9%) | 99,110 (58.1%) |
| Yes | 38,941 (42.7%) | 41,153 (47.5%) | 70,151 (41.1%) |
| Self-reported health | |||
| Excellent | 27,536 (30.2%) | 20,465 (23.6%) | 29,329 (17.2%) |
| Very good | 36,812 (40.4%) | 34,807 (40.2%) | 58,725 (34.4%) |
| Good/fair/poor | 26,789 (29.4%) | 31,307 (36.2%) | 82,444 (48.3%) |
| Married | 37,106 (40.7%) | 43,174 (49.9%) | 85,631 (50.2%) |
| Current smoker | 19,614 (21.5%) | 19,527 (22.6%) | 46,754 (27.4%) |
| Body mass index | |||
| <18.5 | 5,097 (5.6%) | 3,275 (3.8%) | 6,459 (3.8%) |
| 18.5–25 | 48,142 (52.8%) | 40,914 (47.3%) | 71,744 (42.1%) |
| 25–30 | 27,109 (29.7%) | 28,615 (33.0%) | 55,681 (32.6%) |
| >30 | 9,182 (10.1%) | 12,230 (14.1%) | 32,313 (18.9%) |
| Work physical activity | |||
| Sit or little walking | 14,293 (15.7%) | 17,972 (20.8%) | 50,514 (29.6%) |
| Stand or walk lots with no lifting | 41,731 (45.8%) | 41,198 (47.6%) | 74,879 (43.9%) |
| Lift light loads or climb stair/hills often | 27,453 (30.1%) | 22,058 (25.5%) | 34,187 (20.0%) |
| Heavy work or lift heavy loads | 7,425 (8.1%) | 5,150 (5.9%) | 10,487 (6.1%) |
| Requiring help with Activities of Daily Living | 6,810 (7.5%) | 10,062 (11.6%) | 35,151 (20.6%) |
| Number of household Individuals, mean (SD) | 2.9 (1.4) | 2.7 (1.4) | 2.6 (1.4) |
| Number of hospitalizations (past three years), mean (SD) | 0.2 (0.6) | 0.2 (0.7) | 0.3 (0.9) |
| Number of outpatient visits (past year), mean (SD) | 7.0 (9.1) | 8.2 (10.2) | 10.00 (12.5) |
| Influenza vaccination | 14,451 (15.9%) | 16,814 (19.4%) | 37,396 (21.9%) |
| Chronic medical conditions | |||
| Cancers | 6,089 (6.7%) | 7,211 (8.3%) | 16,041 (9.4%) |
| Chronic cardiovascular diseases | 19,579 (21.5%) | 24,221 (28.0%) | 57,166 (33.5%) |
| Chronic respiratory diseases | 22,645 (24.8%) | 21,868 (25.3%) | 49,669 (29.1%) |
| Diabetes | 4,681 (5.1%) | 5,624 (6.5%) | 16,453 (9.6%) |
| Lipid disorder | 9,207 (10.1%) | 10,474 (12.1%) | 21,321 (12.5%) |
| Immunodeficiency (due to disease and/or therapy) | 354 (0.4%) | 351 (0.4%) | 810 (0.5%) |
| Anemia | 3,285 (3.6%) | 3,993 (4.6%) | 10,517 (6.2%) |
| Other disorders | 3,980 (4.4%) | 5,003 (5.8%) | 14,449 (8.5%) |
| Season of survey completion | |||
| Fall | 22,272 (24.4%) | 20,065 (23.2%) | 37,613 (22.0%) |
| Spring | 23,599 (25.9%) | 24,897 (28.8%) | 51,747 (30.3%) |
| Summer | 32,072 (35.2%) | 25,386 (29.3%) | 37,958 (22.3%) |
| Winter | 13,212 (14.5%) | 16,240 (18.8%) | 43,264 (25.4%) |
MET = resting metabolic rate.
a
– Data are presented as Number (%) of patients unless otherwise specified.