Table 3.
Reasons for medical abortion failure among women choosing simultaneous or interval administration of mifepristone and misoprostol for early medical abortion from 1 May 2015 to 30 April 2016 at British Pregnancy Advisory Service (N=28,901)
| Simultaneous (n=24,543) | Interval (n=4,358) | p-value | |
|---|---|---|---|
| (n) | (n) | ||
|
| |||
| Continuing pregnancy (total) | (596) | (39) | |
|
| |||
| Opted against surgical intervention | (18) | (1) | |
|
| |||
| Indications for surgical evacuation | % [95% CI] (n) |
% [95% CI] (n) |
|
|
| |||
| Continuing pregnancy | |||
| Overall (days) | 2.4 [2.2–2.5] (578) |
0.9 [0.6–1.2] (38) |
<0.001 |
| ≤ 49 | 1.4 [1.2–1.6] (192) |
0.2 [0.1–0.6] (5) |
<0.001 |
| 50 – 56 | 2.8 [2.4–3.2] (174) |
0.8 [0.4–1.4] (10) |
<0.001 |
| 57 – 63 | 5.0 [4.4–5.8] (212) |
2.2 [1.4–3.3] (23) |
<0.001 |
|
| |||
| Retained non-viable gestational sac or incomplete abortion | |||
|
| |||
| Overall (days) | 3.1 [2.8–3.3] (752) |
2.0 [1.6–2.5] (87) |
<0.001 |
| ≤ 49 | 2.9 [2.6–3.2] (403) |
1.7 [1.2–2.4] (34) |
0.003 |
|
| |||
| 50 – 56 | 3.5 [3.0–3.9] (218) |
2.0 [1.3–2.9] (26) |
0.007 |
| 57 – 63 | 3.1 [2.6–3.7] (131) |
2.6 [1.7–3.8] (23) |
0.447 |