Table 1.
Baseline clinical characteristics at year 0 by change in BMI trajectory groups
| Variable | Stable BMI (n = 1,225) | Mild increase (n = 1,324) | Moderate increase (n = 576) | Major increase (n = 185) | P* |
|---|---|---|---|---|---|
| Demographic characteristics | |||||
| Age (y) | 26.3 ± 3.2 | 25.3 ± 3.4 | 23.4 ± 3.6 | 21.4 ± 3.1 | <.0001 |
| Race | |||||
| Black | 419 (34.2) | 613(46.3) | 360 (62.5) | 131 (70.8) | <.0001 |
| Women | 646 (52.7) | 698 (52.7) | 364 (63.2) | 136 (73.5) | <.0001 |
| Education | <.0001 | ||||
| High school or less | 337 (27.5) | 455 (34.4) | 244 (42.4) | 92 (49.7) | |
| Some college | 347 (28.3) | 448 (33.8) | 237(41.2) | 79 (42.7) | |
| College graduate | 345 (28.2) | 277 (20.9) | 69 (12.0) | 10(5.4) | |
| Graduate school | 196 (16.0) | 144 (10.9) | 26 (4.5) | 4 (2.2) | |
| Cardiovascular risk factors at year 0 | |||||
| Current smoker | 314 (25.8) | 349 (26.5) | 151 (26.4) | 42 (22.7) | .731 |
| BMI (kg/m2) | 24.7 ± 5.1 | 24.1 ± 4.4 | 24.0 ± 4.3 | 23.2 ± 3.5 | <.0001 |
| WC (cm) | 78.8 ± 11.9 | 77.3 ± 10.2 | 75.5 ± 9.9 | 73.6 ± 8.3 | <.0001 |
| WHR | 0.78 ± 0.07 | 0.78 ± 0.07 | 0.76 ± 0.06 | 0.75 ± 0.07 | <.0001 |
| Systolic BP (mm Hg) | 110 ± 11 | 110 ± 11 | 110 ± 10 | 107 ± 11 | .004 |
| Diastolic BP (mm Hg) | 69 ± 10 | 69 ± 9 | 68 ± 9 | 66 ± 9 | <.0001 |
| Hypertension | 32 (2.6) | 26 (2.0) | 10 (1.7) | 4 (2.2) | .594 |
| Total cholesterol (mg/dL) | 180 ± 34 | 178 ± 32 | 173 ± 30 | 169 ± 33 | <.0001 |
| Fasting glucose (mg/dL) | 83 ± 11 | 82 ± 9 | 80 ± 8 | 80 ± 10 | <.0001 |
| HDL cholesterol (mg/dL) | 53 ± 13 | 53 ± 12 | 54 ± 13 | 54 ± 12 | .031 |
| Triglyceride (mg/dL) | 77 ± 56 | 71 ± 39 | 64 ± 35 | 60 ± 28 | <.0001 |
BP, Blood pressure; HDL, high-density lipoprotein.
Data are expressed as mean ± SD or as number (percentage).
*
Chi-square test for categorical variables and analysis of variance for continuous variables.