Table 2. Baseline Characteristics of Randomized Participants (n = 391) by Treatment Groupa.
| Completers | Dropouts | |||
|---|---|---|---|---|
| Controlb n = 153 |
Exercisec n = 166 |
Control n = 26 |
Exercise n = 46 |
|
| Age (years) | 25.2 ± 0.3 | 25.4 ± 0.3 | 25.0 ± 0.6 | 24.5 ± 0.5 |
| Height (cm) | 165.4 ± 0.6 | 164.9 ± 0.5 | 166.0 ± 1.1 | 164.4 ± 1.0 |
| Weight (kg) | 67.6 ± 1.2 | 67.4 ± 1.1 | 73.1 ± 3.4 | 67.5 ± 2.4 |
| BMI (kg/m2) | 24.7 ± 0.4 | 24.7 ± 0.4 | 26.4 ± 1.1 | 24.8 ± 0.7 |
| Race | ||||
| Asian | 26 (17%) | 20 (12.1%) | 1 (3.8%) | 9 (19.6%) |
| Black/African American | 12 (7.8%) | 13 (7.8%) | 4 (15.4%) | 6 (13%) |
| American Indian | 0 (0) | 1 (0.6%) | 0 (0) | 0 (0) |
| White | 107 (70%) | 124 (74.7%) | 20 (76.9%) | 28 (60.9%) |
| Multi-race | 8 (5.2%) | 8 (4.8%) | 1 (3.9%) | 3 (6.5%) |
| Ethnicity | ||||
| Non-Hispanic | 147 (96.1%) | 158 (95.2%) | 23 (88.5%) | 42 (91.3%) |
| Hispanic | 6 (3.9%) | 8 (4.8%) | 3 (11.5%) | 4 (8.7%) |
| Education | ||||
| Less than high school | 1 (0.6%) | 0 (0) | 0 (0) | 0 (0) |
| High school | 4 (2.6%) | 8 (4.8%) | 1 (3.8%) | 2 (4.3%) |
| Vocational training | 2 (1.3%) | 3 (1.8%) | 2 (7.7%) | 0 (0) |
| Some college | 44 (28.8%) | 43 (26%) | 9 (34.6%) | 21 (45.7%) |
| College degree | 63 (41.2%) | 56 (33.7%) | 9 (37%) | 16 (34.8%) |
| Grad/professional degree | 39 (25.5%) | 56 (33.7%) | 5 (19.2%) | 7 (15.2%) |
| Marital Status | ||||
| Never married | 124 (81%) | 138 (83.1%) | 22 (84.6%) | 36 (78.3%) |
| Married | 25 (16.3%) | 22 (13.2%) | 4 (15.4%) | 10 (21.7%) |
| Separated | 0 (0) | 1 (0.7%) | 0 (0%) | 0 (0%) |
| Divorced | 3 (2%) | 2 (1.2%) | 0 (0%) | 0 (0%) |
| Domestic partnered | 1 (0.6%) | 3 (1.8%) | 0 (0%) | 0 (0%) |
| Previous Use of Contraceptives | ||||
| No | 71 (46.4%) | 82 (49.4%) | 10 (38.5%) | 20 (43.5%) |
| Yes | 82 (53.6%) | 84 (50.6%) | 16 (61.5%) | 26 (56.5%) |
| Parity | ||||
| Nulliparous | 144 (94.1%) | 154 (92.8%) | 24 (92.3%) | 43 (93.5%) |
| Parous | 9 (5.9%) | 12 (7.2%) | 2 (7.7%) | 3 (6.5%) |
a
Continuous variables are expressed as means ± SE and categorical variables are expressed as frequencies (%).
b
p-values for comparisons between controls (completers × dropouts): 0.62 (height), 0.13 (weight), 0.78 (age), 0.14 (BMI), 0.24 (race), 0.39 (education), 0.10 (ethnicity), 0.72 (previous use of contraceptives) 0.87 (marital status), 0.77 (parity).
c
p-values for comparisons between exercisers (completers × dropouts): 0.70 (height), 0.99 (weight), 0.14 (age), 0.91 (BMI), 0.38 (race), 0.05 (education), 0.31 (ethnicity), 0.48 (previous use of contraceptives) 0.48 (marital status), 0.87 (parity).