Prevalence and changes of intimate partner violence against women aged 15 to 49 years in 53 low-income and middle- income countries from 2000 to 2021: a secondary analysis of population-based surveys

Background In low-income and middle-income countries (LMICs), intimate partner violence poses a substantial barrier to accomplishing target 5.2 of the Sustainable Development Goals: to eliminate all forms of violence against women and girls. Our study aimed to assess the prevalence and changes of intimate partner violence against women in LMICs. We also explored the association between women's empowerment and intimate partner violence. Methods In this secondary analysis of population-based surveys, we obtained data from the nationally representative Demographic and Health Surveys conducted in LMICs between 2000 and 2021. We selected countries with available data on the domestic violence module, and women aged 15 to 49 years who currently or formerly had a husband or partner, and who had provided information about intimate partner violence, were included in the analysis. We first estimated the weighted prevalence of intimate partner violence in LMICs with available data, and then we assessed the average annual rate of change using Poisson regression with robust error variance in a subset of countries with at least two surveys. We used multilevel analysis to investigate the association between intimate partner violence and women's empowerment measured at both the country and individual levels. Country-level empowerment was measured by gender inequality index, while individual-level empowerment considered social independence, decision making, and attitude to violence. Findings A total of 359 479 women aged 15 to 49 years were included from 53 LMICs. 336 811 women from 21 countries with two surveys provided data for assessing the trends of intimate partner violence. The weighted prevalence of any type of intimate partner violence was 37 center dot 2% (95% CI 36 center dot 6 to 37 center dot 8). A significant overall decline in the prevalence of any type of intimate partner violence was observed with an average annual rate of change of -0 center dot 2% (95% CI -0 center dot 4 to -0 center dot 03); however six countries showed significant increasing trends, with average annual rates of change ranging from 1 center dot 2% (95% CI 0 center dot 7 to 1 center dot 7) in Nigeria to 6 center dot 6% (5 center dot 3 to 7 center dot 8) in Sierra Leone. Notably, the prevalence of psychological intimate partner violence has risen (average annual rate of change, 2 center dot 3% [95% CI 2 center dot 1 to 2 center dot 6]), reflected in increased rates across eight countries. Higher levels of country-level women's empowerment were associated with a lower risk of intimate partner violence: women from countries with the highest tertile of gender inequality index had an increased odds of any type of intimate partner violence (odds ratio 1 center dot 58 [95% CI 1 center dot 12 to 2 center dot 23]). Similarly, better individual-level women's empowerment also showed significant associations with a lower risk of intimate partner violence. Interpretation The prevalence of intimate partner violence remains high, and some countries have shown an increasing trend. The strong relationship between both country-level and individual-level women's empowerment and the prevalence of intimate partner violence suggests that accelerating women's empowerment could be one strategy to further reduce intimate partner violence against women.