Abstract: Eight studies involving 22,018 participants met our eligibility criteria. Five studies (n = 18,962) assessed the safety and effectiveness of surgical abortion procedures administered by mid-level providers compared to doctors. Three studies (n = 3056) assessed the safety and effectiveness of medical abortion procedures. The surgical abortion studies (one RCT and four cohort studies) were carried out in the United States, India, South Africa and Vietnam. The medical abortion studies (two RCTs and one cohort study) were carried out in India, Sweden and Nepal. The studies included women with gestational ages up to 14 weeks for surgical abortion and nine weeks for medical abortion. Risk of selection bias was considered to be low in the three RCTs, unclear in four observational studies and high in one observational study. Concealment bias was considered to be low in the three RCTs and high in all five observational studies. Although none of the eight studies performed blinding of the participants to the provider type, we considered the performance bias to be low as this is part of the intervention. Detection bias was considered to be high in all eight studies as none of the eight studies preformed blinding of the outcome assessment. Attrition bias was low in seven studies and high in one, with over 20% attrition. We considered six studies to have unclear risk of selective reporting bias as their protocols had not been published. The remaining two studies had published their protocols. Few other sources of bias were found. Based on an analysis of three cohort studies, the risk of surgical abortion failure was significantly higher when provided by mid-level providers than when procedures were administered by doctors (RR 2.25, 95% CI 1.38 to 3.68), however the quality of evidence for this outcome was deemed to be very low. For surgical abortion procedures, we found no significant differences in the risk of complications between mid-level providers and doctors (RR 0.99, 95% CI 0.17 to 5.70 from RCTs; RR 1.38, 95% CI 0.70 to 2.72 from observational studies). When we combined the data for failure and complications for surgical abortion we found no significant differences between mid-level providers and doctors in both the observational study analysis (RR 1.36, 95% CI 0.86 to 2.14) and the RCT analysis (RR 3.07, 95% CI 0.16 to 59.08). The quality of evidence of the outcome for RCT studies was considered to be low and for observational studies very low. For medical abortion procedures the risk of failure was not different for mid-level providers or doctors (RR 0.81, 95% CI 0.48 to 1.36 from RCTs; RR 1.09, 95% CI 0.63 to 1.88 from observational studies). The quality of evidence of this outcome for the RCT analysis was considered to be high, although the quality of evidence of the observational studies was considered to be very low. There were no complications reported in the three medical abortion studies. There was no statistically significant difference in the risk of failure for medical abortions performed by mid-level providers compared with doctors. Observational data indicate that there may be a higher risk of abortion failure for surgical abortion procedures administered by mid-level providers, but the number of studies is small and more robust data from controlled trials are needed. There were no statistically significant differences in the risk of complications for first trimester surgical abortions performed by mid-level providers compared with doctors.

Plain-language summary: We carried out searches for studies that compared medical abortion (using pills) or surgical abortion provided by either mid-level providers or doctors. We also wrote to researchers to find more studies. The studies could compare how safe the abortions were or how effective they were (whether they actually worked). The evidence we found is up to date as of the 15th of August 2014. We found eight studies with a total of 22,018 participants. Five studies compared surgical abortion provided by doctors or mid-level providers and three studies compared medical abortion provided by doctors or mid-level providers. Of the five surgical abortion studies only one had a high-quality study design. Of the three medical abortion studies, two had a high-quality study design. Three of these studies were carried out in America, two in India, one in was carried out in both South Africa and Vietnam the remaining two were from Sweden and Nepal. The results from the analyses of the medical abortion studies showed that there does not seem to be an advantage when these are provided by doctors. The results from most of the analyses of the surgical abortion studies showed that we cannot be sure that there is a difference in how safe and how effective mid-level providers are compared to doctors. One analysis of three low-quality studies of surgical abortion showed that there was more chance of the abortion being ineffective if it was provided by mid-level providers. Most of the studies did not show a difference between mid-level providers and doctors in how safe the abortions were and how well they worked. Training mid-level providers to give medical or surgical abortions could reduce the number of deaths and the disability caused by unsafe abortion. Studies in the future should focus on what types of mid-level providers can provide safe and effective abortions. They should also look at whether mid-level providers are as safe and effective as doctors for providing abortions in rural developing country settings.