Table 2: Comparison of sociodemographic and drinking characteristic between nonparticipant, responders and nonresponders among those patients who did the test on their own initiative.

Non-participants -value (nonparticipants versus nonresponders)Nonresponders -value (non-responders versus responders)Responders -value (nonparticipants versus responders)

Gender ( ) (%) (%) (%)
 Male1074 (60)50 (57)84 (60)
 Female720 (40)38 (43)55 (40)
Total1794 (100).57988 (100).678139 (100).929

Age ( ) (%) (%) (%)
 18–20187 (11)15 (17) 3 (2)
 21–30389 (22)24 (27)15 (11)
 31–40338 (19)16 (18)19 (14)
 41–50312 (18)13 (15)21 (15)
 51–60255 (14) 9 (10)30 (22)
303 (17)11 (13)51 (37)
Total1784 (100).23288 (100).000139 (100).000

Weekly consumption, g/week ( )
 Median (range)84 (504)90 (432)72 (420)
 Mean (SE)110.6 (2.2).965111.0 (9.5).04989.3 (6.4).002

Frequency of HED, no. of HED occasions/month ( )
 Median (range)3 (30)3 (29)3 (30)
 Mean (SE)4.8 (0.2).3514.1 (0.6).4424.8 (0.6).982