Table 2.
Characteristics of United States women age 20–39 in 1999–2004a, by past-year oral contraceptive use.
| OC users (%) | Non-users (%) | p-value | |
|---|---|---|---|
| Age in years, mean (SD) | 29.1 (0.3) | 30.7 (0.3) | <0.01 |
| One or more prior live births | 49.4 | 67.5 | <0.01 |
| Education | |||
| <9th grade | 2.0 | 3.9 | <0.01 |
| 9–11th grade | 9.2 | 14.4 | |
| HS graduate/GED | 16.3 | 27.2 | |
| Some college or AA degree | 34.9 | 32.3 | |
| College graduate or above | 37.5 | 22.2 | |
| Race/ethnicity | |||
| Non-Hispanic White | 71.7 | 60.3 | <0.01 |
| Non-Hispanic Black | 8.4 | 16.2 | |
| Mexican-American/Other Hispanic | 15.1 | 19.2 | |
| Other | 4.8 | 4.3 | |
| Poverty-income ratio | |||
| <100% | 10.9 | 24.2 | <0.01 |
| 100–199% | 18.7 | 23.7 | |
| 20–299% | 13.5 | 17.4 | |
| 300–399% | 13.9 | 15.7 | |
| >=400% | 43.0 | 19.0 | |
| Number of male sex partners in past year | |||
| None | 4.4 | 16.1 | <0.01 |
| One | 77.2 | 69.6 | |
| Two or more | 18.4 | 14.3 | |
| Marital status | |||
| Married | 51.3 | 48.6 | 0.63 |
| Never married | 27.5 | 31.4 | |
| Other | 21.2 | 20.1 | |
| Ever smoker | 37.3 | 41.7 | 0.25 |
| Less active than others your age | 24.0 | 30.2 | 0.02 |
| Body mass index category, % | |||
| Underweight (<18.5) | 5.0 | 3.7 | <0.01 |
| Normal (18.5–24.9) | 49.9 | 38.1 | |
| Overweight (25.0–29.9) | 23.4 | 24.3 | |
| Obese (>=30.0) | 21.8 | 33.9 | |
| Constant health insurance past year, % | 77.5 | 66.0 | <0.01 |
| Chronic disease | 6.9 | 11.2 | 0.06 |
| Pregnancy status, % | |||
| Not pregnant | 77.9 | 77.9a | 0.98 |
| Pregnant in the past year | 11.9 | 12.2 | |
| Currently pregnant | 10.2 | 10.0 |
a
Assessed among all women with non-missing data for each specific variable.