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. 2016 Dec 6;2016(12):CD005091. doi: 10.1002/14651858.CD005091.pub4

Krishnan 1997.

Methods Randomised controlled trial; single centre; India
Participants N = 18. Inclusion criteria were neonates requiring gentamicin therapy as per unit protocol, 32 to 36 weeks' gestation, < 96 h of age, and serum creatinine < 1 mg/dl. 'Once a day' gentamicin: N = 9.
 Multiple doses a day' gentamicin: N = 9. Mean gestational age was 34.1 ± 1.5 weeks in 'once a day' gentamicin group and 34.0 ± 1.9 weeks in 'multiple doses a day' group. Mean BW in 'once a day' group was 1940 ± 510 g and 1739 ± 527 g in 'multiple doses a day' group.
Interventions 'Once a day' gentamicin group were given gentamicin at 4 mg/kg/dose once every 24 h. 'Multiple doses a day' gentamicin group were given gentamicin at 2.5 mg/kg/dose every 12 h. Gentamicin was given as 1‐min bolus intravenously followed by normal saline flush of 0.5 ml.
Outcomes Peak levels were collected 1 hour after the first dose and the dose given at 48 h. Trough levels were collected just prior to the dose of gentamicin due at 48 h after the start of the therapy. Other outcomes measured were serum creatinine.
Notes Additional information and methodology were clarified by the authors.
Risk of bias
Bias Authors' judgement Support for judgement
Random sequence generation (selection bias) Low risk Computer‐generated random numbers.
Allocation concealment (selection bias) Low risk Sealed envelopes
Blinding (performance bias and detection bias) 
 All outcomes Low risk Outcome assessors were blinded.
Incomplete outcome data (attrition bias) 
 All outcomes Low risk All 18 neonates were included in the results.
Selective reporting (reporting bias) High risk "There was no nephrotoxicity in either groups at the end of therapy." There was no pre‐specified analysis method to measure nephrotoxicity in the methodology.
Other bias Low risk Appears to be free of other sources of bias.