Odds ratios ( 95 % confidence intervals ) of incident CKD ( < 60 ml/min per 1.73 m ( 2 ) ) and rapid decline of kidney function ( 3 ml/min per year ) for eicosapentaenoic acid-docosahexaenoic acid compared with placebo were 0.83 ( 0.58 to 1.18 ) and 0.85 ( 0.67 to 1.08 ) , respectively .