RESULTS	Delivery at < 32 and < 34 weeks did not differ between the two groups ( 12.9 versus 9.7 % ; [ RR 1.3 ; 95 % CI 0.7-2 .5 ] and 19.7 versus 12.9 % [ RR 1.5 ; 95 % CI 0.9-2 .4 ] , respectively ) .\