CRP and acute kidney injury: AKI (P < .001), noradrenaline use on the day of colistin initiation (P < .001), meropenem use on the day of colistin initiation (P = .011), age (P < .001), APACHE II score (P < .001), SOFA score (P < .001), serum CRP level (P < .001) and serum urea level (P = .004) were significantly higher in the deceased group than the survival group.