Risk of injury due to alcohol: Evaluating potential bias using the case-crossover usual-frequency method
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Background: The usual-frequency case-crossover method, comparing exposure before an event with typical exposure of the same person, is widely used to estimate the risk of injury related to acute alcohol use. Prior results suggest that risk estimates might be biased upward compared with other methods. Methods: Using data from 15 emergency room studies in seven countries, we compared the usual-frequency case-crossover method with case-control analysis, using noninjury patients as controls. Control-crossover analysis was performed to examine potential bias and to adjust risk estimates. Results: The cross-study pooled odds ratio (OR) of injury related to drinking was 4.7 (95% confidence interval = 2.6–8.5) in case-crossover analysis and 2.1 (1.6–2.7) in case-control analysis. A control-crossover analysis found an indication of bias (OR = 2.2 [1.8–2.8]), which was larger among less-frequent drinkers. Conclusion: Findings suggest that the potential overestimation of injury risk based on the usual-frequency case-crossover method might be best explained by recall bias in usual-frequency estimates.
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Cherpitel, C.; Ye, Y.; Bond, J.; Stockwell, Tim; Vallance, K.; Martin, G.; Brubacher, J.; MacPherson, A. (2014)Background: The magnitude of risk of injury from drinking, based on emergency department (ED) studies, has been found to vary considerably across studies, and the impact of study design on this variation is unknown. ...
A Systematic Review and Meta-Analysis of Alcohol Consumption and Injury Risk as a Function of Study Design and Recall PeriodZeisser, C.; Stockwell, Tim; Chikritzhs, Tanya; Cherpitel, C.; Ye, Y.; Gardner, C. (2013)Background: It is well established that alcohol consumption is associated with an increased risk of injury. This systematic review and meta-analysis addresses important methodological issues commonly encountered in the ...
Recall bias across 7 days in self-reported alcohol consumption prior to injury among emergency department patientsCherpitel, C.; Ye, Y.; Stockwell, Tim; Vallance, K.; Chow, C. (2017)© 2017 Australasian Professional Society on Alcohol and other Drugs.Introduction and Aims: Recall bias is a concern in self-reported alcohol consumption, potentially accounting for varying risk estimates for injury in ...