For rhabdomyolysis after heatstroke, the incidence of AKI was 73.08% in the highest myoglobin quartile (≥ 1000 ng/mL) and 12.82% in the lowest quartile (< 127 ng/mL), which yielded an adjusted odds ratio of AKI that was 18.95 (95% confidence interval [CI], 6.00–59.83) times as high in the highest quartile as in the lowest quartile (Figure 1). Here, MB is linked to acute kidney injury.