Table 4.
Model 3—Hazard Ratio Coefficients Predicting Association between Index of Disadvantage and Contraceptive Practice, by Self-identified Race, Method, and Survey Wave, Relative to Continuation
| Method, Race/Ethnicity | Switching HR(CI) |
Discontinuing HR(CI) |
|||||||
|---|---|---|---|---|---|---|---|---|---|
| 1-month | 3-months | 6-months | 12-months | 1-month | 3-months | 6-months | 12-months | ||
| ALL METHODSǂ | White | 1.21** (1.060-1.374) | 1.08 (.942-1.234) | 1.17** (1.041-1.309) | 1.10 (.977-1.248) | 0.89 (.685-1.180) | 1.07 (.834-1.381) | 1.11 (.917-1.335) | 1.19 (.967-1.458) |
| Hispanic | 131*** (1.114-1.530) | 1.16 (.991-1.372) | 1.26*** (1.095-1.456) | 1.19* (1.027-1.389) | 0.94 (.703-1.261) | 1.12 (.852-1.481) | 1.16 (.919-1.461) | 1.24 (.995 -1.553) | |
| Black | 1.29 (.942-1.760) | 1.15 (.839-1.576) | 1.25 (.916-1.693) | 1.18 (.863-1.608) | 0.89 (.547-1.443) | 1.06 (.662-1.700) | 1.09 (.688-1.738) | 1.17 (.686-1.895) | |
| Asian | 1.56** (1.176-2.068) | 1.39* (1.154-1.971) | 1.51** (1.083-1.878) | 1.43* (1.048-1.803) | 1.09 (.686-1.741) | 1.30 (.823-2.067) | 1.35 (.871-2.077) | 1.44 (.940-2.213) | |
| Multiracial | 1.29** (.973-1.432) | 1.15 (.958-1.388) | 1.25** (1.056-1.478) | 1.18 (.989-1.410) | 1.12 (.822-1.524) | 1.34 (.997-1.791) | 1.38* (1.063-1.786) | 1.48** (1.150-1.898) | |
| The Pill | White | 1.10 (.983-1.221) | 0.97 (.862-1.090) | 1.05 (.952-1.158) | 0.99 (.897-1.097) | 0.82 (.551-1.044) | 1.00 (.823-1.218) | 1.03 (.896-1.183) | 1.12 (.961-1.308) |
| Hispanic | 1.22** (1.060-1.403) | 1.08 (.932-1.249) | 1.17* (1.029-1.327) | 1.10 (.965-1.262) | 0.91 (.702-1.178) | 1.10 (.880-1.386) | 1.14 (.927-1.393) | 1.24* (1.028-1.488) | |
| Black | 1.24 (.922-1.659) | 1.09 (.811-1.476) | 1.18 (.887-1.582) | 1.12 (.835-1.500) | 0.87 (.533-1.407) | 1.05 (.657-1.682) | 1.08 (.672-1.739) | 1.18 (.731-1.895) | |
| Asian | 1.52** (1.154-1.997) | 1.34* (1.022 -1.766) | 1.45** (1.116-1.897) | 1.37* (1.048-1.803) | 1.16 (.698-1.936) | 1.41 (.853-2.335) | 1.45 (.889-2.373) | 1.58 (.981-2.55) | |
| Multiracial | 1.18 (.972-1.432) | 1.04 (.863-1.262) | 1.13 (.948-1.349) | 1.07 (.890-1.282) | 1.06 (.779-1.445) | 1.29 (.970-1.709) | 1.32* (1.015-1.729) | 1.44** (1.119-1.859) | |
| LNg IUD | White | 1.21** (1.064-1.381) | 1.07 (.927-1.242) | 1.16* (1.033-1.307) | 1.10 (.968-1.244) | 0.81 (.614-1.055) | 0.98 (.765-1.250) | 1.01 (.818-1.237) | 1.09 (.873-1.372) |
| Hispanic | 1.35*** (1.162-1.567) | 1.19* (1.014-1.406) | 1.249*** (1.131-1.478) | 1.22** (1.057-1.412) | 0.89 (.677-1.165) | 1.08 (.839-1.386) | 1.11 (.879-1.401) | 1.21 (.964-1.513) | |
| Black | 1.37* (1.007-1.861) | 1.21 (.883-1.661) | 1.31 (.971-1.771) | 1.24 (.911-1.684) | .85 (.519-1.377) | 1.03 (.637-1.655) | 1.06 (.651-1.713) | 1.15 (.705-1.875) | |
| Asia | 1.68*** (1.276-2.214) | 1.49** (1.125-1.966) | 1.61*** (1.235-2.100) | 1.52** (1.157-2.000) | 1.14 (.679-1.898) | 1.38 (.827-2.299) | 1.42 (.859-2.341) | 1.54 (.944-2.525) | |
| Multiracial | 1.31** (1.073-1.591) | 1.16 (.946-1.411) | 1.25* (1.048-1.494) | 1.18 (.980-1.426) | 1.04 (.761-1.411) | 1.26 (.941-1.682) | 1.29 (.981-1.707) | 1.41* (1.073-1.849) | |
| Copper IUD | White | 1.03 (.882-1.194) | 0.91 (.780-1.056) | 0.98 (.860-1.124) | 0.93 (.816-1.056) | 0.82 (.613-1.084) | 0.99 (.761-1.287) | 1.02 (.808-1.284) | 1.11 (.872-1.409) |
| Hispanic | 1.14 (.957-1.362) | 1.01 (.848-1.204) | 1.09 (.935-1.280) | 1.03 (.883-1.209) | 0.90 (.664-1.220) | 1.09 (.800-1.455) | 1.12 (.853-1.481) | 1.22 (.942-1.588) | |
| Black | 1.16 (.854-1.569) | 1.02 (.755-1.391) | 1.11 (.952-1.289) | 1.05 (.780-1.408) | 0.86 (.525-1.397) | 1.04 (.644-1.679) | 1.07 (.656-1.743) | 1.16 (.714-1.898) | |
| Asian | 1.42* (1.082-1.869) | 1.26 (.961-1.646) | 1.36* (1.051-1.765) | 1.287 (.991-1.672) | 1.15 (.666-1.987) | 1.40 (.810-2.408) | 1.44 (.839-2.460) | 1.56 (.925-2.643) | |
| Multiracial | 1.11 (.897-1.361) | .98 (.801-1.194) | 1.06 (.880-1.274) | 1.00 (.830-1.205) | 1.05 (.743-1.480) | 1.27 (.917-1.769) | 1.31 (.951-1.806) | 1.43* (1.047-1.943) | |
| Implant | White | 1.11 (.975-1.273) | .99 (.857-1.134) | 1.07 (.938-1.215) | 1.01 (.887-1.145) | 0.77* (.592-.996) | 0.93 (.746-1.165) | 0.96 (.771-1.194) | 1.04 (.842-1.295) |
| Hispanic | 1.24** (1.073-1.432) | 1.10 (.945-1.273) | 1.19* (1.037-1.360) | 1.12 (.977-1.288) | 0.85 (.644-1.116) | 1.03 (.806-1.314) | 1.06 (.817-1.371) | 1.15 (.914-1.453) | |
| Black | 1.26 (.935-1.689) | 1.11 (.824-1.502) | 1.11 (.827-1.489) | 1.14 (.847-1.528) | 0.81 (.489-1.329) | 0.98 (.603-1.589) | 1.01 (.607-1.672) | 1.10 (.664-1.811) | |
| Asian | 1.54** (1.174-2.029) | 1.37* (1.040-1.793) | 1.48** (1.133-1.931) | 1.40* (1.066-1.831) | 1.08 (.659-1.781) | 1.32 (.806-2.146) | 1.35 (.824-2.221) | 1.47 (.915-2.371) | |
| Multiracial | 1.20 (.971-1.481) | 1.06 (.863-1.306) | 1.15 (.943-1.401) | 1.09 (.888-1.328) | 0.99 (.714-1.368) | 1.20 (.890-1.617) | 1.23 (.903-1.686) | 1.34* (1.004-1.798) | |
| Injectable | White | 0.97 (.851-1.108) | 0.86* (.739-.999) | 0.93 (.806-1.073) | 0.88 (.766-1.007) | 0.77* (.603-.975) | 0.93 (.766-1.132) | 0.96 (.808-1.135) | 1.04 (.853-1.274) |
| Hispanic | 1.08 (.924-1.263) | 0.96 (.805-1.135) | 1.04 (.881-1.217) | 0.98 (.833-1.148) | 0.85 (.665-1.076) | 1.03 (.841-1.255) | 1.06 (.866-1.290) | 1.15 (.944-1.403) | |
| Black | 1.10 (.820-1.464) | 0.97 (.717-1.310) | 1.20 (.899-1.613) | .99 (.739-1.331) | 0.81 (.515-1.259) | 0.98 (.638-1.499) | 1.01 (.645-1.568) | 1.10 (.696-1.722) | |
| Asian | 1.35* (1.012-1.788) | 1.19 (.891-1.590) | 1.29 (.969-1.714) | 1.22 (.914-1.622) | 1.08 (.643-1.818) | 1.31 (.788-2.188) | 1.35 (.813-2.247) | 1.47 (.890-2.431) | |
| Multiracial | 1.05 (.861-1.270) | .93 (.758-1.130) | 1.00 (.827-1.213) | .95 (.781-1.146) | 0.99 (.718-1.356) | 1.20 (.898-1.599) | 1.23 (.922-1.647) | 1.34* (1.004-1.793) | |
| Vaginal Ring | White | 0.97 (.799-1.173) | 0.86 (.702-1.045) | 0.93 (.771-1.116) | 0.88 (.727-1.056) | 0.73* (.556-.964) | 0.89 (.704-1.121) | 0.91 (.717-1.166) | 1.00 (.778-1.273) |
| Hispanic | 1.08 (.870-1.333) | 0.95 (.766-1.186) | 1.03 (.842-1.265) | .98 (.792-1.201) | 0.81 (.595-1.096) | 0.98 (.747-1.287) | 1.01 (.750-1.357) | 1.10 (.831-1.451) | |
| Black | 1.09 (.787-1.516) | .97 (.692-1.350) | 1.05 (.782-1.408) | .989 (.713-1.371) | 0.77 (.464-1.273) | 0.93 (.575-1.516) | 0.96 (.574-1.605) | 1.05 (.626-1.745) | |
| Asian | 1.34 (.978-1.840) | 1.19 (.865-1.629) | 1.29 (.944-1.749) | 1.21 (.888-1.661) | 1.03 (.609-1.751) | 1.25 (.747-2.103) | 1.29 (.760-2.189) | 1.40 (.840-2.347) | |
| Multiracial | 1.04 (.811-1.340) | .92 (.718-1.184) | 1.00 (.788-1.266) | .94 (.741-1.202) | 0.94 (.677-1.311) | 1.14 (.848-1.543) | 1.18 (.851-1.626) | 1.28 (.941-1.744) | |
| Study Controls | ✓ | ||||||||
| Individual Controls | ✓ | ||||||||
| N | 8,683 | ||||||||
ǂ
To estimate the switching and discontinuation hazard ratio coefficients across all methods, the model must be specified without enrollment method as a categorical variable; the model used to determine the coefficients in the “All Methods” section differ from the subsequent model in this way
P-values are for a significance test of whether the slope for the index of disadvantage coefficient (accounting for the interacted terms) is significantly different from zero.
*
p<.05
**
p<.01
***
p<.001
Note that significance tests are not possible in a multinomial logit event history model for the hazards of the reference event (continuation).