AKI definition and intervention
AKI was defined according to the Kidney Disease: Improving Global
Outcome (KDIGO) guidelines [18]. Urinalysis, renal ultrasonography,
measurements for blood erythrocyte morphology, and measurements of the
fractional excretion of sodium (FENa) performed at AKI onset. Time to
AKI was defined as the interval between anti-TB treatment initiation and
AKI onset. Renal recovery was defined as the return of serum creatinine
level to the baseline level when the initial serum creatinine level had
not fit the KDIGO AKI criteria. AKI duration was defined as the interval
between AKI onset and renal recovery.