Fig. 3

The line graph indicates a segmented linear regression of pharmacists as first authors of articles written in Japanese during the pre- and post-implementation periods. The trend slightly increased before the implementation period [β1 = 1.33, 95% confidence interval (CI): −0.62–3.28; P = 0.169]. Afterward, the level (β2 = 11.41, 95%CI: − 0.23–23.05; P = 0.054) increased, whereas the slope decreased (β3 = −2.07, 95%CI: −4.16–0.03; P = 0.053)