Related Experiment Video
Updated: Mar 15, 2026

External Cephalic Version: Is it an Effective and Safe Procedure?
Published on: June 6, 2020
Evidence-based medicine in obstetrics: can levels B and C recommendations be elevated to level A recommendations?
, Suneet P Chauhan1, Eugene Chang2
1Aurora Health Care , West Allis, WI.
Abstract:
In this study, 65% (132/195) of level B/C obstetric recommendations are amenable to randomized clinical trials (RCTs) and seven were identified as most needed. The purpose of the survey was to evaluate levels B and C recommendations in obstetric practice bulletins (PBs) regarding the feasibility of performing RCT to elevate each subject to level A evidence. Eleven geographically dispersed physicians with experience in research reviewed levels B and C recommendations for the ethical and logistical feasibility of performing an RCT. In the 35 obstetric PBs, 195 level B/C recommendations were reviewed. The majority considered 47 (24%) topics unethical for an RCT and thought 16 (11%) did not need an RCT, thus leaving 132 (67%) levels B and C recommendations available for an RCT. Two-thirds of levels B and C recommendations in obstetric PB are amenable to RCTs and potentially becoming level A evidence.
Related Concept Videos
Methods of Documentation V: CBE
In CBE, healthcare professionals establish predefined standards of practice that define what constitutes...
Standards of Care II
Levels of Health Promotion and Illness Prevention
In primary prevention, actions taken before disease onset prevent the disease from...
Healthcare Associated Infections II: Preventive Measures
The best practices for preventing healthcare-associated infections include hand hygiene, patient risk...
Standards of Care I
Nursing Interventions II: Selecting and Classifying the Nursing Interventions

