Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Analyses conducted by random effects model. Interstudy heterogeneity was tested by the Cochran Q statistic (χ2) at a significance level of P < .1. The meta-analysis of the theoretical knowledge scores found that the problem-based learning (PBL) teaching model significantly increased theoretical knowledge scores compared to those of the lecture-based learning (LBL) teaching model.
