RESULTS	Multilevel multiple linear regression analyses showed that computer-tailoring respondents ( mean 0.35 , SD 0.31 units per week ) with average ( P = .007 ) or lower ( P < .001 ) alcohol use before pregnancy or with average ( P = .03 ) or lower ( P = .002 ) social support more strongly reduced their alcohol use 6 months after baseline compared to usual care respondents ( mean 0.48 , SD 0.54 units per week ) .\