Fig. 2
From: The association between plant-based diet and erectile dysfunction in Chinese men
The trend analysis of associations between IIEF-5 scores and PDI or hPDI. # Trend analysis within ED group. † Comparison of PDI or hPDI by Student t-test between the control group (IIEF-5 score: 22–25) and mild ED group (IIEF-5 score: 17–21). ** < 0.01, *** < 0.001. Abbreviations: hPDI: healthful plant-based diet index; IIEF-5: International Index of Erectile Function-5; PDI: overall plant-based diet index