Trends in inequalities of alcohol-related harms among Thai households: 2007-2017

•The prevalence of alcohol-related harms in Thailand increased between 2007 and 2017.•Poor households had a greater chance to incur harms from alcohol with more inequality.•The drinking-and-driving was the most important alcohol-related harm in Thailand. To estimate and compare the socio-economic inequities in alcohol-related harms among households in Thailand between 2007 and 2017 adjusted for socioeconomic status with the proportions of current and binge drinkers in each household. A secondary data analysis of the 2007 and 2017 National Cigarette and Alcohol Consumption Survey was conducted. The unit of analysis was household-level. Concentration index (CI) was used to measure household income-based inequalities in alcohol-related harms (i.e., workplace, domestic, non-domestic, financial, and drinking-and-driving) in the previous 12 months. Based on data from two waves of survey (n = 66,776 in 2007 and 39,630 in 2017), the prevalence of households that had at least one member who had an alcohol-related harm event was 21.8% and 26.2% in 2007 and 2017, respectively. The highest prevalence was the drinking-and-driving domain (about 20%). The prevalence increased between 2007 and 2017 with an annual rate of change ranged from 1.2 to 4.4%. All of the CI values were negative for both survey waves, except the drink-and-driving domain in 2007. The CI values for all domains in 2017 had a larger magnitude than in 2007, except the domestic domain. For any alcohol-related harm, the CI value was not significant at +0.002 (Standard error [SE] 0.004) in 2007, but significant at -0.014 (SE 0.004) in 2017. So, the index changed around -0.016. The poor households had a slightly greater tendency to incur harms from alcohol and there existed more inequality in the prevalence of harms in 2017 compared with 2007.