Table 1.
Characteristics of study participants [mean ± SD or n (%)].
| Characteristic | All subjects (n = 166) | Male (n = 83) | Female (n = 83) |
|---|---|---|---|
| Age (years) | 27.5 ± 4.0 | 28.3 ± 4.0 | 26.8 ± 3.8 |
| < 25 | 42 (25.3) | 15 (18.1) | 27 (32.5) |
| 25–35 | 120 (72.3) | 64 (77.1) | 56 (67.5) |
| > 35 | 4 (2.4) | 4 (4.8) | 0 |
| BMIa | 25.3 ± 5.3 | 26.1 ± 4.7 | 24.4 ± 4.9 |
| < 18.5 | 4 (2.4) | 0 | 4 (4.8) |
| 18.5–24.9 | 88 (53.0) | 37 (44.6) | 51 (61.5) |
| 25.0–29.9 | 45 (27.1) | 30 (36.1) | 15 (18.1) |
| ≥ 30 | 28 (16.9) | 15 (18.1) | 13 (15.7) |
| Missing | 1 (0.6) | 1 (1.2) | 0 |
| Race | |||
| Caucasian | 144 (86.7) | 71 (85.5) | 73 (88.0) |
| Other/multiracialb | 20 (12.0) | 11 (13.3) | 10 (12.0) |
| Missing | 1 (0.6) | 1 (1.2) | 0 |
| Hispanic | |||
| Yes | 6 (3.6) | 1 (1.2) | 5 (6.0) |
| No | 159 (95.8) | 81 (97.6) | 78 (94.0) |
| Missing | 1 (0.6) | 1 (1.2) | 0 |
| Annual incomec | |||
| < $19,000 | 22 (13.3) | — | — |
| $20,000–$39,000 | 54 (32.5) | — | — |
| $40,000–$74,999 | 61 (36.8) | — | — |
| $75,000–$99,000 | 15 (9.0) | — | — |
| ≥ $100,000 | 10 (6.0) | — | — |
| Missing | 4 (2.4) | — | — |
| Employment | |||
| Employed for wages | 99 (59.6) | 46 (55.4) | 53 (63.8) |
| Self-employed | 10 (6.0) | 4 (4.8) | 6 (7.2) |
| Homemaker | 10 (6.0) | 0 | 10 (12.1) |
| Student | 44 (26.5) | 31 (37.4) | 13 (15.7) |
| Unemployed/otherd | 2 (1.2) | 1 (1.2) | 1 (1.2) |
| Missing | 1 (0.6) | 1 (1.2) | 0 |
| Education | |||
| High School/GED | 4 (2.4) | 3 (3.6) | 1 (1.2) |
| Some college (1–3 years) | 60 (36.1) | 33 (39.8) | 27 (32.5) |
| College (> 4 years, graduate) | 101 (60.8) | 46 (55.4) | 55 (66.3) |
| Missing | 1 (0.6) | 1 (1.2) | 0 |
| Smoking | |||
| Never | 149 (89.8) | 70 (84.3) | 79 (95.2) |
| Former | 10 (6.0) | 7 (8.4) | 3 (3.6) |
| Current | 5 (3.0) | 4 (4.8) | 1 (1.2) |
| Missing | 2 (1.2) | 2 (2.4) | 0 |
| Abbreviations: BMI, body mass index; GED, General Equivalency Diploma. aWeight (kg)/height (m)2 (measured at enrollment). bIncludes Asian, Black/African American, Pacific Islander, American Indian/Alaskan Native. cU.S. dollars, combined household income for both partners. dIncludes out of work, retired, unable to work. | |||