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Divergent trends of alcohol consumption and harm – A case of polarization among Swedish youth?

Divergent trends of alcohol consumption and harm – A case of polarization among Swedish youth?. Johan Svensson Presentation at the nordic alcohol and drug researchers’ assembly, Copenhagen, August 27 – 29, 2012.

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Divergent trends of alcohol consumption and harm – A case of polarization among Swedish youth?

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  1. Divergent trends of alcohol consumption and harm – A case of polarization among Swedish youth? Johan Svensson Presentation at the nordic alcohol and drug researchers’ assembly, Copenhagen, August 27 – 29, 2012

  2. Average consumption of alcohol (100%), girls and boys in grade 9 (age 15-16) and alcohol related hospital admissions (age 15-19) in Sweden, 2000 - 2010

  3. Background These divergent trends are not expected and raise questions on the association among youth between: 1, Average consumption and heavy drinking? 2, Average consumption and harm?

  4. Background A plausible mechanism behind the divergent trends is a polarization of drinking among young Swedes. Heavy drinkers drink even more whereas moderate and light drinkers drink less.

  5. Background The idea of polarized drinking among youth has been discussed in several studies: Iceland Bjarnason, T. (2006). Polarization in alcohol consumption among Icelandic adolescents, 1995-2003. Nord Stud Alcohol Drugs, 23, 51-58. Britain Measham, F. (2008). The turning tides of intoxication: Young people's drinking in britain in the 2000s. Health Education, 108(3), 207-222. Meier, P. (2010). Polarized drinking patterns and alcohol deregulation. Nord Stud Alcohol Drugs, 27, 383-408. Australia Livingston, M. (2008). Recent trends in risky alcohol consumption and related harm among young people in Vicoria, Australia. Australian and New Zeeland journal of public health, 32, 266- 271. Sweden Hallgren, M. Leifman, H. Andréasson, S. (2012). Drinking Less But Grater Harm: Could Polarized Drinking Explain the Divergence Between Alcohol Consumption and Harms Among Youth? Alcohol and Alcoholism (in press).

  6. Aim: To test whether there are signs of a shift in the distribution of drinking among grade 9 pupils in Sweden during the period 2000-2010.

  7. Data and methods Data: Annual school surveys conducted by CAN Number of respondents varies from app. 4.900 – 5.300 each year. Age: grade 9 pupils (age 15-16) Analysis: To test the polarization hypothesis: For each year the consumers were split into 20 equally large groups (each group representing 5% of the consumers). (Ranked 20=highest consumption, 1=lowest consumption Mean consumption was used to test for signs of a shift in the distribution. In this presentation comparison is made between the first two years (2000 and 2001) and the last two years (2009 and 2010). Preliminary analysis!

  8. Long-term trends in average consumption and abstainers in Swedenboys and girls (grade 9 age 15-16), 1989-2010 (CAN-data)

  9. A case of polarization?

  10. Trends in average consumption in different consumer groups, boys (grade 9), 2000-2010 (CAN-data)

  11. Trends in average consumption in different consumer groups, girls (grade 9), 2000-2010 (CAN-data)

  12. A case of polarization – self-reported problems?

  13. Trends in average number of self reported problems in different consumer groups, girls (grade 9), 2000-2010 (CAN-data)

  14. Trends in average number of self reported problems in different consumer groups, boys (grade 9), 2000-2010 (CAN-data)

  15. Trends in heavy episodic drinking (at least once a month) in different consumer groups, boys (grade 9), 2000-2010 (CAN-data)

  16. Significant difference between 2000/2001 and 2009/2010 in heavy episodic drinking (at least once a month) in different consumer groups, boys (grade 9), 2000-2010 (CAN-data)

  17. Trends in heavy episodic drinking (at least once a month) in different consumer groups, girls (grade 9), 2000-2010 (CAN-data)

  18. Significant difference between 2000/2001 and 2009/2010 in heavy episodic drinking (at least once a month) in different consumer groups, girls (grade 9), 2000-2010 (CAN-data)

  19. …another example of a polarized trends among youth – school grades and being qualified to apply for high school in Sweden

  20. Trends in average grade and proportion of pupils qualified to apply for high school in Sweden (grade 9) 2002-2010 (The Swedish National Agency for Education)

  21. Conclusions Preliminary analysis suggest: • Rates of abstainers have increased during the period among both boys and girls, – further analysis needed! • Significant increase in consumption among the heaviest consumers (top 5%) both boys and girls. …whereas other groups decreased their consumption • Significant increase in average numbers of self-reported problems among the heaviest consumers (top 15%) both boys and girls. …whereas other groups were stable • No significant increase in heavy episodic drinking among the heaviest consumers (top 15%) both boys and girls. …whereas other groups experienced a decrease • Other areas of societal changes among youth may also have undergone similar divergent trends – common mechanisms?

  22. Mange tak!

  23. Mange tak!

  24. Mange tak!

  25. Different period • Perhaps more marginlazied groups! • Overall the consumtion has gone down!

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