Table 2
Binary logistic regression of the binge drinking frequency of “weekly to daily” and “less than monthly to monthly,” and the type of friends among adolescents of Belo Horizonte, Minas Gerais, Brazil, 2010
Weekly or daily Less than monthly to monthly
All participants N of cases (%) Odds Ratio (95% CI) p-value N of cases (%) Odds Ratio (95% CI) p-value

Friends from school vs.

Hobbies/others*

14.4

8.9

 2.26 (1.33–3.85) 0.003 36.8 (23.2) 2.21 (1.51–3.21) <0.001

Friends from family vs.

hobbies/others*

10.1

10.8

 0.94 (0.50–1.74) 0.832 28.2 (27.3) 1.04 (0.68–1.57) 0.869

Friends from church vs.

Hobbies/others*

6.9

12.2

 0.42 (0.22–0.80) 0.008 18.0 (31.5) 0.43 (0.28–0.66) <0.001

Friends from hobbies vs.

Hobbies/others*

10.9

10.6

 1.00 (0.50–2.01) 0.651 25.7 (27.8) 0.90 (0.55–1.47) 0.358
Females

Friends from school vs.

Hobbies/others*

13.1

7.3

 2.75 (1.36–5.53) 0.005 40.0 (20.6) 2.99 (1.87–4.78) <0.001

Friends from family vs.

Hobbies/others*

8.7

9.2

 0.97 (0.44–2.15) 0.939 28.2 (26.1) 1.10 (0.67–1.83) 0.701

Friends from church vs.

Hobbies/others*

4.6

11.2

 0.30 (0.12–0.73) 0.008 16.0 (31.5) 0.37 (0.22–0.63) <0.001

Friends from hobbies/others vs.

Hobbies/others*

11.3

8.8

 1.13 (0.44–2.90) 0.791 17.0 (28.0) 0.53 (0.25–1.15) 0.107
Males

Friends from school vs.

Hobbies/others*

16.9

11.8

 1.64 (0.72–3.74) 0.240 31.0 (28.3) 1.26 (0.66–2.39) 0.482

Friends from family vs.

Hobbies/others*

13.0

13.6

 0.94 (0.35–2.52) 0.894 28.3 (29.4) 0.94 (0.45–1.96) 0.859

Friends from church vs.

Hobbies/others*

12.1

13.9

 0.72 (0.29–1.82) 0.489 22.4 (31.5) 0.59 (0.29–1.21) 0.152

Friends from hobbies vs.

Hobbies/others*

10.4

14.3

 0.78 (0.27–2.25) 0.651 35.4 (27.4) 1.39 (0.69–2.80) 0.358

* Hobbies/others (friends from theater, dances, music activities, sports, and others).

Zarzar et al. BMC Public Health 2012 12:257   doi:10.1186/1471-2458-12-257

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