Mean physical fatigue score at day 3 postpartum , adjusted for baseline and mode of delivery , was 0.8 lower in the RBC transfusion arm ( 95 % confidence interval : 0.1-1 .5 , P = 0.02 ) and at 1 week postpartum was 1.06 lower ( 95 % confidence interval : 0.3-1 .8 , P = 0.01 ) .