Table 2. Unadjusted and Adjusted Rate of Complete Medication Abortion by Characteristics of the Sample.
| Characteristic | Unadjusted complete case effectiveness rate, % (95% CI) | P value | Adjusted imputed effectiveness rate, % (95% CI)a | P value |
|---|---|---|---|---|
| No. | 2397 | NA | 3779 | NA |
| Overall | 94.5 (92.9-96.1) | NA | 94.8 (93.6-95.9) | NA |
| Age at mifepristone provision, y | ||||
| <24 | 96.4 (94.8-98.0) | [Reference] | 96.6 (95.3-98.0) | [Reference] |
| 25-34 | 94.1 (92.2-96.8) | .01 | 94.3 (92.8-95.9) | .02 |
| ≥35 | 92.8 (90.0-95.6) | .004 | 92.6 (89.9-95.3) | .002 |
| Race and ethnicity | ||||
| Black | 93.8 (91.2-96.5) | .88 | 93.9 (91.5-96.2) | .43 |
| Latinx/Hispanic | 96.4 (94.1-98.7) | .13 | 96.3 (94.1-98.6) | .31 |
| White | 94.0 (92.0-96.1) | [Reference] | 94.9 (93.4-96.4) | [Reference] |
| Multiracial or otherb | 93.8 (90.1-97.5) | .90 | 93.7 (90.1-97.3) | .53 |
| Residence | ||||
| Urban | 94.0 (91.6-96.5) | [Reference] | 94.2 (91.9-96.5) | [Reference] |
| Rural | 94.7 (93.0-96.4) | .61 | 94.9 (93.6-96.2) | .57 |
| Previous medication abortion | ||||
| None | 94.6 (92.8-96.3) | [Reference] | 94.7 (93.4-95.9) | [Reference] |
| Any | 95.1 (92.6-97.5) | .69 | 95.1 (92.9-97.3) | .70 |
| Participated in the TelAbortion study | ||||
| No | 94.1 (92.1-96.0) | [Reference] | 94.4 (93.2-95.8) | [Reference] |
| Yes | 96.0 (93.9-98.2) | .14 | 96.3 (94.3-98.2) | .17 |
| Method of mifepristone provision | ||||
| In person | 94.9 (93.1-96.7) | [Reference] | 95.4 (94.1-96.7) | [Reference] |
| Mailed | 94.0 (91.8-96.3) | .54 | 93.3 (90.7-95.9) | .14 |
| Pregnancy duration, d | ||||
| <43 | 95.2 (93.4-97.1) | [Reference] | 95.5 (94.1-97.0) | [Reference] |
| 43-56 | 95.2 (93.4-97.0) | .97 | 95.5 (94.1-96.9) | >.99 |
| ≥57 | 90.9 (87.1-94.6) | .004 | 90.9 (87.6-94.2) | .003 |
a
Multivariable estimates are adjusted for all other covariates in the table. Both models are mixed-effects models estimated with clinic as a random intercept.
b
The “other” category included Alaska Native, American Indian, Asian, Asian Indian, Filipino, Guyanian, Guamanian/Chamorro, Japanese, Middle Eastern, Native American, Native Hawaiian, Pacific Islander, and Turkish.