Characteristic Ondansetron (n = 32) Placebo (n = 33) p
Age, mean (SD) 43.44 (9.53) 42.67 (8.67) t = 0.34, 63 df, p = 0.73
Marital status, n (%)
Married
Single
Separated / Widowed

17 (53.12)
3 (9.38)
12 (37.50)

24 (72.73)
3 (9.09)
6 (18.18)
χ2 = 3.20, 2 df, p = 0.21
Education, n (%)
12th grade or less
High school or more

16 (50)
16 (50)

18 (54.55)
15 (45.45)
χ2 = 0.13, 1 df, p = 0.81
Quantity of ethanol per day (in grams), mean
(SD)a

328.20
(218.26)

295.26
(167.94)
t = 0.68, 63 df, p = 0.49
Years since alcohol-related problems occurred, mean (SD) 12.94 (11.21) 12.94 (8.15) t < 0.01, 63 df, p > 0.99
Early Onset Alcoholics, n (%) 14 (43.75) 14 (42.42) χ2 = 0.01, 1 df, p = 0.91
Family history of alcoholism, n (%) 25 (78.12) 27 (81.81) χ2 = 0.14, 1 df, p = 0.76
Previous treatments for alcoholism, n (%) 21 (65.62) 22 (66.67) χ2 < 0.99, 1 df, p > 0.99
Monthly income (in R$, the Brazilian currency)
mean (SD)

1537.97
(1470.56)

1499.09
(880.48)
t = 0.13, 63 df, p = 0.90
Cigarettes smoked/day
mean (SD)
17.34 (8.37) 15 (12.78) t = 0.87, 63 df, p = 0.39
aIndicates alcohol usage during the last three months preceding the study
Table 1: Baseline psychosocial characteristics and alcohol use-related aspects between ondansetron and placebo groups.
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