Factors affecting blood alcohol concentration (BAC) estimation and drinking intention during voluntary breath testing (VBT): a cross-sectional study. (3rd September 2022)

• Record Type: Journal Article
• Authors: Pathirana, Naomi; Medveczky, David; Deng, Wendy; Abel, Sophie; Zask, Avigdor; Rolfe, Margaret; Preston, Philip; Pit, Sabrina
• Is Part Of: Drugs. Volume 29:Number 5(2022)
• Page Start: 519
• Page End: 527
• Publication Date: 2022-09-03
• Subjects: Blood alcohol concentration (BAC) -- voluntary breath testing (VBT) -- music festival -- driving -- estimation -- drinking; Health education -- Periodicals; Medical policy -- Periodicals; Substance abuse -- Periodicals; Éducation sanitaire -- Périodiques; Politique sanitaire -- Périodiques; Polytoxicomanie -- Périodiques; 362.291705
• DOI: 10.1080/09687637.2020.1865272
• Languages: English
• ISSNs: 0968-7637

Abstract

Abstract: This study aimed to assess the accuracy and factors influencing blood alcohol concentration self-estimation during voluntary breath testing. It also aimed to assess whether intended drinking behaviour changed after reviewing blood alcohol concentration and factors influencing this. A total of 462 Australian music festival patrons aged 18–40 years completed a survey exploring factors likely to affect estimation accuracy and provided an estimation of their blood alcohol concentration. A breathalyser reading was taken and participants were asked whether reviewing this reading changed their drinking intentions. Most respondents (58.4%) were accurate within 0.02% range, while 11.4% underestimated and 29.1% overestimated. Machine-read blood alcohol concentration was the most significant estimation accuracy predictor. Reviewing their readings changed the intention to drink in one-third of participants, indicating that voluntary breath testing may influence future drinking behaviour. Underestimation was associated with intention to drink less, whilst completing the survey earlier and <1 h since last drink was associated with intention to drink more.