Table 3.
Crude and adjusted relative risks for effective methods and less effective methods at time of enrollment compared to non-contraceptors
| All | White only | Black only | ||||
|---|---|---|---|---|---|---|
|
| ||||||
| RR (95% CI) | aRR (95% CI)1 | RR (95% CI) | aRR (95% CI)2 | RR (95% CI) | aRR (95% CI)2 | |
|
| ||||||
| Any EOD | ||||||
| Effective | 1.19 (1.05–1.35) | 1.20 (0.99–1.44) | 1.13 (0.97–1.32) | 1.20 (0.91–1.59) | 1.29 (1.02–1.63) | 1.12 (0.86–1.45) |
| Less effective | 1.32 (1.18–1.48) | 1.30 (1.12–1.51) | 1.19 (1.02–1.39) | 1.12 (0.89–1.41) | 1.51 (1.27–1.80) | 1.44 (1.17–1.77) |
|
| ||||||
| Gender | ||||||
| Effective | 1.22 (1.08–1.38) | 1.02 (0.84–1.23) | 1.21 (1.04–1.41) | 1.06 (0.80–1.41) | 1.10 (0.87–1.40) | 0.97 (0.74–1.28) |
| Less effective | 1.22 (1.10–1.36) | 1.22 (1.06–1.41) | 1.21 (1.05–1.41) | 1.17 (0.93–1.46) | 1.21 (1.03–1.42) | 1.23 (1.01–1.49) |
|
| ||||||
| Race | ||||||
| Effective | 1.04 (0.91–1.19) | 1.18 (0.97–1.44) | 1.10 (0.90–1.33) | 1.21 (0.87–1.68) | 1.37 (1.09–1.72) | 1.17 (0.91–1.51) |
| Less effective | 1.20 (1.08–1.34) | 1.25 (1.08–1.45) | 1.22 (1.02–1.45) | 1.26 (0.98–1.60) | 1.34 (1.14–1.57) | 1.23 (1.02–1.49) |
|
| ||||||
| SES | ||||||
| Effective | 0.98 (0.84–1.13) | 1.13 (0.92–1.39) | 0.97 (0.80–1.18) | 1.25 (0.91–1.70) | 1.02 (0.79–1.33) | 0.98 (0.72–1.33) |
| Less effective | 1.19 (1.06–1.33) | 1.23 (1.06–1.43) | 1.11 (0.93–1.32) | 1.11 (0.86–1.43) | 1.27 (1.08–1.49) | 1.32 (1.08–1.60) |
|
| ||||||
| Work/school | ||||||
| Effective | 1.12 (0.99–1.27) | 1.15 (0.95–1.38) | 1.12 (0.96–1.31) | 1.25 (0.95–1.65) | 1.17 (0.93–1.48) | 1.02 (0.78–1.33) |
| Less effective | 1.32 (1.19–1.46) | 1.35 (1.17–1.55) | 1.31 (1.13–1.51) | 1.34 (1.07–1.67) | 1.37 (1.18–1.60) | 1.32 (1.09–1.59) |
|
| ||||||
| Medical care | ||||||
| Effective | 0.87 (0.71–1.07) | 1.08 (0.83–1.39) | 0.88 (0.68–1.14) | 1.25 (0.88–1.77) | 0.91 (0.64–1.29) | 0.91 (0.60–1.37) |
| Less effective | 1.00 (0.86–1.17) | 1.04 (0.86–1.27) | 1.02 (0.82–1.26) | 1.03 (0.76–1.40) | 1.02 (0.81–1.27) | 1.08 (0.83–1.40) |
|
| ||||||
| Street/public setting | ||||||
| Effective | 1.23 (1.09–1.40) | 1.13 (0.93–1.36) | 1.14 (0.97–1.33) | 0.93 (0.68–1.28) | 1.42 (1.13–1.79) | 1.27 (0.98–1.65) |
| Less effective | 1.25 (1.13–1.39) | 1.27 (1.10–1.47) | 1.10 (0.94–1.29) | 0.99 (0.78–1.27) | 1.44 (1.24–1.69) | 1.49 (1.23–1.80) |
|
| ||||||
| Getting job | ||||||
| Effective | 0.80 (0.65–0.98) | 0.85 (0.65–1.12) | 0.66 (0.45–0.95) | 0.66 (0.36–1.21) | 1.10 (0.84–1.46) | 0.95 (0.69–1.31) |
| Less effective | 1.10 (0.96–1.26) | 1.13 (0.95–1.35) | 0.94 (0.73–1.23) | 1.00 (0.70–1.42) | 1.23 (1.03–1.46) | 1.23 (0.99–1.52) |
|
| ||||||
| House/apartment | ||||||
| Effective | 1.03 (0.85–1.25) | 1.38 (1.09–1.74) | 0.93 (0.70–1.24) | 1.38 (0.95–2.01) | 1.38 (1.04–1.82) | 1.51 (1.12–2.04) |
| Less effective | 1.21 (1.05–1.39) | 1.36 (1.15–1.61) | 1.14 (0.91–1.43) | 1.23 (0.90–1.67) | 1.33 (1.10–1.59) | 1.50 (1.22–1.85) |
|
| ||||||
| Contraception | ||||||
| Effective | 0.80 (0.49–1.32) | 0.90 (0.49–1.67) | 0.75 (0.36–1.54) | 1.33 (0.63–2.81) | 1.04 (0.53–2.06) | 0.71 (0.26–1.99) |
| Less effective | 1.25 (0.97–1.61) | 1.07 (0.73–1.58) | 1.22 (0.83–1.80) | 1.20 (0.64–2.26) | 1.22 (0.83–1.78) | 1.04 (0.62–1.73) |
Effective = intrauterine device, implantable, DMPA, contraceptive pill, patch or ring.
Less effective = barrier method, natural family planning, withdrawal, etc.
Reference category = non-contraceptors.
1
Age (continuous), race, trouble paying for basics, number of unintended pregnancies (continuous).
2
Age (continuous), trouble paying for basics, number of unintended pregnancies (continuous).