mean ( +/- sd ; range ) birth weight , gestation , postnatal age , and balance weight were 1,320 g ( +/- 200 ; 820-1,720 ) , 32.0 weeks ( +/- 2.0 ; 27-34 ) , 36 days ( +/- 14.8 ; 15-87 ) , and 1,729 g ( +/- 146 ; 1,435-2,070 ) , respectively .
C0005612
birth weight
C0005910
weight