Time until medically fit for discharge was similar in both groups , mean [ 95 % confidence interval ( CI ) ] 12.2 ( 11.1-13 .5 ) vs 13.1 ( 11.9-14 .5 ) days ( P = 0.31 ) , as was total length of stay 14.2 ( 12.9-15 .8 ) vs 15.3 ( 13.8-17 .2 ) days ( P = 0.32 ) .