Table 3.
Multivariable analysis of factors related to dual method use among all method users (N=6744)
| Characteristic | Adjusted relative risk | 95% CI | P value* | |
|---|---|---|---|---|
| Contraceptive method used | ||||
| Oral contraceptive pills | Reference | |||
| Intrauterine device | 0.74 | 0.65 | 0.84 | <0.01 |
| Contraceptive implant | 0.71 | 0.61 | 0.83 | <0.01 |
| DMPA | 0.96 | 0.82 | 1.12 | 0.59 |
| Contraceptive patch/ring | 0.93 | 0.78 | 1.11 | 0.43 |
| Age | ||||
| <25 | Reference | |||
| ≥25 | 0.78 | 0.71 | 0.86 | <0.01 |
| Race | ||||
| White | Reference | |||
| Black | 1.85 | 1.68 | 2.04 | <0.01 |
| Other | 1.10 | 0.90 | 1.35 | 0.35 |
| Educational level | ||||
| High school or less | Reference | |||
| Some college, college degree or higher | 0.85 | 0.78 | 0.93 | <0.01 |
| Marital Status | ||||
| Single/never married | Reference | |||
| Married/living with partner | 0.49 | 0.44 | 0.56 | <0.01 |
| Separate/divorced/widowed | 0.82 | 0.67 | 1.00 | 0.05 |
| Baseline dual method use | ||||
| Yes | 1.51 | 1.36 | 1.67 | <0.01 |
| No | Reference | |||
| Partner willingness to use a condom | ||||
| Not at all/not very willing | Reference | |||
| Somewhat/extremely willing | 1.48 | 1.28 | 1.71 | <0.01 |
| Condom self-efficacy score | ||||
| <20 | Reference | |||
| ≥20 | 1.28 | 1.17 | 1.40 | <0.01 |
| STI at baseline | 1.24 | 1.10 | 1.39 | <0.01 |
*
P values obtained using Chi-square test