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Author Knudsen, A.K.; Skogen, J.C. url  doi
  Title Monthly variations in self-report of time-specified and typical alcohol use: the Nord-Trondelag Health Study (HUNT3) Type Journal Article
  Year 2015 Publication BMC Public Health Abbreviated Journal BMC public health  
  Volume 15 Issue Pages 172  
  Keywords Adult; Aged; Aged, 80 and over; Alcohol Drinking/*epidemiology; *Alcoholic Beverages; Bias (Epidemiology); Data Collection/*standards; Female; Health Surveys/*standards; Humans; Male; Middle Aged; Prevalence; Research Design; Risk Factors; Seasons; Self Report; Time Factors; Young Adult  
  Abstract BACKGROUND: Aggregated measures are often employed when prevalence, risk factors and consequences of alcohol use in the population are monitored. In order to avoid time-dependent bias in aggregated measures, reference periods which assess alcohol use over longer time-periods or measures assessing typical alcohol use are considered superior to reference periods assessing recent or current alcohol consumption. Alcohol consumption in the population is found to vary through the months of the year, but it is not known whether monthly variations in actual alcohol use affects self-reports of long-term or typical alcohol consumption. Using data from a large, population-based study with data-collection over two years, the aim of the present study was to examine whether self-reported measures of alcohol use with different reference periods fluctuated across the months of the year. METHODS: Participants in the third wave of the Nord-Trondelag Health Survey (HUNT3) answered questions regarding alcohol use in the last 4 weeks, weekly alcohol consumption last twelve months, typical weekly binge drinking and typical number of alcoholic drinks consumed in a 14 day period. For each of the alcohol measures, monthly variations in reporting were estimated and compared to the overall average. RESULTS: Monthly variations in self-reported alcohol use were found across all alcohol measures regardless of reference period. A general tendency was found for highest level of alcohol use being reported during the summer season, however, the highest number of individuals who reported alcohol use in the last 4 weeks was found in January. Women reported substantially larger increase in weekly binge drinking during the summer months than men. CONCLUSIONS: Self-reports of alcohol use over longer time and typical alcohol use varies according to the month the respondents are assessed. Monthly variations should therefore be taken into account when designing, analyzing and interpreting data from population-based studies aimed to examine descriptive and analytical characteristics of alcohol use in the population.  
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  Publisher Place of Publication Department of Health Registries, Norwegian Institute of Public Health, Kalfarveien 31, 5018, Bergen, Editor  
  Language Summary Language Original Title  
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  Notes Knudsen, Ann KristinSkogen, Jens ChristofferengEngland2015/04/18 06:00BMC Public Health. 2015 Feb 21;15:172. doi: 10.1186/s12889-015-1533-8. Approved no  
  Call Number HUNT @ maria.stuifbergen @ Knudsen2015 Serial 1832  
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