Women who received the DVD compared with those who did not , had a higher mean Healthy Eating Index at 36weeks gestation ( 73.6 vs 72.3 ; adjusted mean difference 1.2 ; 95 % CI 0.2 to 2.3 ; p = 0.02 ) , but not at 28weeks gestation ( 73.2 vs 73.5 ; adjusted mean difference -0.1 ; 95 % CI -1.1 to 0.9 ; p = 0.82 ) .