['We investigated the relation between parental tobacco use and malnutrition in children <5 y of age and compared expenditures on foods in households with and without tobacco use.', 'Tobacco use, child anthropometry, and other factors were examined in a stratified, multistage cluster sample of 77 678 households from the Bangladesh Nutrition Surveillance Project (2005-2006). Main outcome measurements were stunting, underweight, and wasting, and severe stunting, severe underweight, and severe wasting. Secondary outcomes included the proportion of household expenditures spent on food.', 'The prevalence of parental tobacco use was 69.9%. Using the new World Health Organization child growth standards, prevalences of stunting, underweight, and wasting were 46.0%, 37.6%, and 12.3%, respectively. After adjusting for potential confounders, parental tobacco use was associated with an increased risk of stunting (odds ratio [OR] 1.17, 95% confidence interval [CI] 1.12-1.21, P < 0.0001), underweight (OR 1.17, 95% CI 1.12-1.22, P < 0.0001), and wasting (OR 1.10, 95% CI 1.03-1.17, P = 0.004), and severe stunting (OR 1.16, 95% CI 1.10-1.23, P < 0.0001), severe underweight (OR 1.21, 95% CI 1.13-1.30, P < 0.0001), and severe wasting (OR 1.14, 95% CI 0.98-1.32, P = 0.09). Households with tobacco use spent proportionately less per capita on food items and other necessities.'] Is parental tobacco use associated with increased risk of child malnutrition in Bangladesh?