Compared with non-drinking , the AORs ( 95 % CI ) of experiencing at least one PPDP for occasional drinking and frequent drinking were 6.72 ( 5.03 , 8.98 ) and 18.11 ( 9.88 , 33.18 ) in fathers ( P for trend < 0.001 ) , and 7.33 ( 5.15 , 10.44 ) and 5.33 ( 1.98 , 14.45 ) in mothers .