Table 1.
Baseline Characteristics of Consistent Oral Contraceptive Users by Body Mass Index Group
| Variable | Normal weight (n=96) | Obese (n=54) | p1 |
|---|---|---|---|
| Height (cm) |
164.1±6.4 |
163.8±6.6 |
0.83 |
| Weight (kg) |
59.6±6.7 |
91.9±9.3 |
<0.01 |
| BMI (kg/m2) |
22.1±1.5 |
34.2±2.6 |
<0.01 |
| Percent body fat (%)2 |
29.2±3.7 |
47.4±3.5 |
<0.01 |
| Fat mass (kg)2 |
17.6±3.7 |
43.8±6.9 |
<0.01 |
| Fat free mass (kg)2 |
42.1±3.9 |
48.2±4.0 |
<0.01 |
| Total body water (kg)2 |
29.4±2.9 |
36.8±3.6 |
<0.01 |
| Age |
24.7±4.5 |
25.7±4.0 |
0.17 |
| Race/ethnicity | |||
| Hispanic |
19 (19.8) |
19 (35.2) |
<0.01 |
| Non-Hispanic black |
30 (31.3) |
23 (42.6) |
|
| Non-Hispanic white |
33 (34.4) |
11 (20.4) |
|
| Non-Hispanic Asian |
14 (14.6) |
1 (1.9) |
|
| Education | |||
| Less than a bachelor's degree |
43 (44.8) |
31 (57.4) |
0.14 |
| Bachelor's degree or more |
53 (55.2) |
23 (42.6) |
|
| Previous pregnancy | |||
| Yes |
29 (30.2) |
28 (51.9) |
<0.01 |
| No |
67 (69.8) |
26 (48.2) |
|
| Previous birth | |||
| Yes |
9 (9.4) |
20 (37.0) |
<0.01 |
| No |
87 (90.6) |
34 (63.0) |
|
| Using OC at enrollment | |||
| Yes |
22 (22.9) |
12 (22.2) |
0.92 |
| No |
74 (77.1) |
42 (77.8) |
|
| Smokes cigarettes | |||
| Yes |
11 (11.5) |
10 (18.5) |
0.23 |
| No |
85 (88.5) |
44 (81.5) |
|
| OC dose | |||
| 20 μg EE/100 μg LNG |
47 (49.0) |
23 (42.6) |
0.45 |
| 30 μg EE/150 μg LNG | 49 (51.0) | 31 (57.4) | |
Values are shown as mean±standard deviation or n (%).
1
t-test for continuous variables and chi-square test or Fisher's exact test for categorical variables.
2
Baseline measurements for these variables were unavailable for one normal weight participant due to machine malfunction.
EE, ethinyl estradiol; LNG, levonorgestrel; OC, oral contraceptive.