Relative to control participants , those who received intervention consumed less alcohol per typical drinking occasion ( median 4 drinks [ interquartile range { IQR } , 2-8 ] vs 5 drinks [ IQR 2-8 ] ; rate ratio [ RR ] , 0.93 [ 99.17 % CI , 0.86-1 .00 ] ; P = .005 ) but not less often ( RR , 0.95 [ 99.17 % CI , 0.88-1 .03 ] ; P = .08 ) or less overall ( RR , 0.95 [ 99.17 % CI , 0.81-1 .10 ] ; P = .33 ) .