Fig. 3.

Adjusted dose–response curves by fasting blood glucose (FBG) quintiles for severe and critical condition of COVID-19 patients. Odds ratios of severe and critical condition in COVID-19 patients according to FBG quintiles (<4.74, 4.74–5.21, 5.21–5.78, 5.78–7.05, and ≧ 7.05 mmol/L) were estimated using the median value for each quintile (4.50, 5.02, 5.50, 6.21, and 9.05 mmol/L, respectively). Model 1 (solid black curve) included FBG quintile. Model 2 (black dashed curve) included FBG quintile, age, gender, and body mass index (BMI). Model 3 (black dotted curve) was additionally adjusted for lactate dehydrogenase (LDH), aspartate aminotransferase (AST), and high-density lipoprotein (HDL) levels.