Although respondents in the experimental communities reported statistically significantly lower average weekly consumption ( 1.90 fewer standard drinks per week , 95 % CI = -3.37 to -0.43 , p = 0.01 ) and less alcohol-related verbal abuse ( odds ratio = 0.58 , 95 % CI = 0.35 to 0.96 , p = 0.04 ) post-intervention , the low survey response rates ( 40 % and 24 % for the pre - and post-intervention surveys , respectively ) require conservative interpretation .