Relative to control participants , those who received intervention consumed less alcohol per typical drinking occasion ( median @ drinks -LSB- interquartile range -LCB- IQR -RCB- , @-@ -RSB- vs @ drinks -LSB- IQR @-@ -RSB- ; rate ratio -LSB- RR -RSB- , @ -LSB- @ % CI , @-@ @ -RSB- ; P = @ ) but not less often ( RR , @ -LSB- @ % CI , @-@ @ -RSB- ; P = @ ) or less overall ( RR , @ -LSB- @ % CI , @-@ @ -RSB- ; P = @ ) .