Factors Associated with Pre-drinking Among Nightclub Patrons in the City of Sao Paulo

Author(s)

Santos, Mariana G. R. ^[1] ; Paes, Angela T. ^[2] ; Sanudo, Adriana ^[3] ; Sanchez, Zila M. ^[1]

Affiliation

^[1] Univ Fed Sao Paulo, Dept Prevent Med, Epidemiol Sect, Sao Paulo - Brazil

^[2] Univ Fed Sao Paulo, Dept Informat Hlth, Sect Stat, Sao Paulo - Brazil

^[3] Univ Fed Sao Paulo, Sect Bioestat, Dept Prevent Med, Sao Paulo - Brazil

• Document type: Journal article
• Source: ALCOHOL AND ALCOHOLISM; v. 50, n. 1, p. 95-102, JAN-FEB 2015.
• Web of Science Citations: 10

Abstract

Aims: The aim of the study was to describe the phenomenon of pre-drinking (alcohol consumption before entering nightclubs or bars) and to identify factors associated with pre-drinking practices among patrons in the city of Sao Paulo, Brazil. Methods: Individual-level data were collected by a portal survey of 2422 patrons at the entrance and at the exit of 31 nightclubs. The nightclubs were selected by two-stage sampling using a probability proportional to the establishments' capacity in the first stage and a systematic sample of patrons in the second stage. Breath alcohol concentration (BrAC) was measured. Face-to-face interview identified pre-drinking characteristics and past-year risk behaviors. Analysis used sample weights to compensate for nightclubs or patrons that were possibly over- or under-represented. Results: Of the study participants, 41.3% (95% confidence interval (CI) = 33.7-49.3) engaged in pre-drinking on the night of the interview. Being male (odds ratio (OR) = 1.98, 95% CI = 1.45-2.71), past-year binge drinking (OR = 2.28, 95% CI = 1.70-3.07), previous episodes of severe effects from drunkenness (OR = 1.77, 95% CI = 1.40-2.22) and sexual risk behavior (OR = 1.67, 95% CI = 1.20-2.33) were associated with recent pre-drinking. Pre-drinking predicted higher BrACs at the nightclub exit. Conclusion: Pre-drinking is prevalent among nightclub patrons and associated with risk behaviors, and is associated with alcohol intoxication at nightclub exits. Environmental prevention strategies must consider pre-drinking as a potential risk factor for alcohol intoxication in nightclubs. (AU)

• FAPESP's process: 12/03832-4 - The phenomenon of "pre-drinking" among young people: characteristics and factors associated with drinking pre-party
• Grantee: Mariana Guedes Ribeiro Santos
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 11/51658-0 - Patterns of alcohol and other drugs consumption on nightclubs and bars: epidemiology, ethnography and intervention
• Grantee: Zila van der Meer Sanchez Dutenhefner
• Support Opportunities: Research Grants - Young Investigators Grants