Table 2.
Associations between selected participant characteristics and use of dual methods, condom alone, or hormonal method or IUD alone; unadjusted odds ratios (OR) and 95% confidence intervals (CI)
| Dual Method OR1 (95% CI) |
Condom alone OR1 (95% CI) |
Hormonal/IUD alone OR1 (95% CI) |
|
|---|---|---|---|
| Age 14–16 years | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| 17–19 years | 1.11 (0.62 – 1.98) | 0.59 (0.35 – 0.99) | 1.23 (0.68 – 2.22) |
| Insurance | |||
| None | 0.41 (0.21 – 0.82) | 0.64 (0.35 – 1.14) | 0.54 (0.28 – 1.04) |
| Private, public or don’t know | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| Participant’s mother completed High School or GED | |||
| Yes | 1.18 (0.65 – 2.13) | 1.58 (0.88 – 2.82) | 1.99 (1.05 – 3.76) |
| No | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| Participant’s mother’s age at first birth <20 | |||
| Yes | 1.88 (1.06 – 3.34) | 1.22 (0.73 – 2.06) | 1.40 (0.79 – 2.45) |
| No | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| Previous STD | |||
| Yes | 1.94 (1.12 – 3.36) | 0.87 (0.51 – 1.49) | 2.04 (1.17 – 3.56) |
| No | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| Previous pregnancy | |||
| Yes | 1.80 (0.99 – 3.27) | 0.82 (0.42 – 1.56) | 1.83 (1.01 – 3.31) |
| No | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| Participant has given birth to a child that lives with her | |||
| Yes | 2.01 (0.87 – 4.66) | 0.84 (0.30 – 2.41) | 3.41 (1.56 – 7.45) |
| No | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| Desires pregnancy in the next 6 months | |||
| Definitely or Probably Yes or Don’t Know | 0.52 (0.19 – 1.44) | 0.41 (0.15 – 1.09) | 1.25 (0.56 – 2.80) |
| Definitely or Probably No | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| Perception of diagnosis of pregnancy in next six months | |||
| It would be the worst thing that could happen | 2.51 (1.40 – 4.52) | 2.04 (1.17 – 3.58) | 1.25 (0.66 – 2.36) |
| Other | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| Perception of diagnosis of STD in next six months | |||
| It would be the worst thing that could happen | 1.32 (0.68 – 2.56) | 0.99 (0.55 – 1.79) | 0.90 (0.49 – 1.67) |
| Other | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| Lifetime partners | |||
| 1–3 | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| 4 or more | 0.65 (0.37 – 1.13) | 1.00 (0.60 – 1.68) | 1.03 (0.60 – 1.79) |
| Relationship length > 6 months | |||
| Yes | 0.86 (0.50 – 1.49) | 0.58 (0.34 – 0.97) | 1.15 (0.66 – 2.02) |
| No | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| Considers partner a serious boyfriend¶ | |||
| Yes | 0.64 (0.37 – 1.10) | 0.74 (0.44 – 1.25) | 1.34 (0.76 – 2.36) |
| No | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| Coital frequency ¶ | |||
| ≥ once per week | 0.51 (0.29 – 0.88) | 0.37 (0.22 – 0.63) | 0.98 (0.56 – 1.71) |
| < once per week | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| Agreed to monogamy¶ | |||
| Yes | 0.50 (0.25 – 1.01) | 0.61 (0.31 – 1.21) | 1.83 (0.73 – 4.61) |
| No | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| Mutual STD testing* | |||
| Yes | 1.78 (1.03 – 3.10) | 0.78 (0.44 – 1.38) | 1.90 (1.09 – 3.32) |
| No | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
1
Versus use of no method or other methods
¶
Refers to most recent partner
*
Participant and most recent partner each had STD testing while they were together