Low-dose corticosteroids prophylaxis was associated with a significantly reduced mechanical ventilation time (MD: −2.74 h, 95% CI: −4.14, −1.33 h; p = 0.0001, I2 = 92%) (Figure 5), without increased risks of myocardial infarction (OR: 0.96, 95% CI: 0.43–2.17; p = 0.93, I2 = 0%) (Figure 2) or insulin infusion (OR: 1.72, 95% CI: 0.83–3.55; p = 0.15, I2 = 36%) (Supplementary Figure S7). Here, INS is linked to myocardial infarction.