With great inequality comes great responsibility: the role of government spending on population health in the presence o
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QUANTITATIVE RESEARCH
With great inequality comes great responsibility: the role of government spending on population health in the presence of changing income distributions Tong Liu 1
&
Daniel J. Dutton 1
Received: 2 March 2020 / Accepted: 19 August 2020 # The Canadian Public Health Association 2020
Abstract Objectives To determine the association between provincial government health and social spending and population health outcomes in Canada, separately for men and women, and account for the potential role of income inequality in modifying the association. Methods We used data for nine Canadian provinces, 1981 to 2017. Health outcomes and demographic data are from Statistics Canada; provincial spending data are from provincial public accounts. We model the ratio of social-to-health spending (“the ratio”) on potentially avoidable mortality (PAM), life expectancy (LE), potential years of life lost (PYLL), infant mortality, and low birth weight baby incidence. We interact the ratio with the Gini coefficient to allow for income inequality modification. Results When the Gini coefficient is equal to its average (0.294), the ratio is associated with desirable health outcomes for adult men and women. For example, among women, a 1% increase in the ratio is associated with a 0.04% decrease in PAM, a 0.05% decrease in PYLL, and a 0.002% increase in LE. When the Gini coefficient is 0.02 higher than average, the relationship between the ratio and outcomes is twice as strong as when the Gini is at its average, other than for PAM for women. Infant-related outcomes do not have a statistically significant association with the ratio. Conclusion Overall, outcomes for men and women have similar associations with the ratio. Inequality increases the return to social spending, implying that those who benefit the most from social spending reap higher benefits during periods of higher inequality. Résumé Objectifs Déterminer l’association entre les dépenses sociales et de santé du gouvernement provincial et les conditions de santé de la population du Canada, séparément pour hommes et femmes, et expliquer le role que l’inégalité salariale pourrait jouer dans la modification de cette association. Méthodes Nous avons utilisé les données pour neuf provinces canadiennes, de 1981 à 2017. Les conditions de santé et les données démographiques parviennent de Statistiques Canada, les données sur les dépenses provinciales parviennent de comptes publiques provinciaux. Nous avons modélisé le rapport de dépenses social-à-santé (« le rapport ») sur la mortalité potentiellement évitable (MPE), l’espérance de vie (EV), les années de vie potentielles perdues (AVPP), la mortalité d’enfant et l’incidence d’un poids à la naissance faible. Nous interagissons le rapport avec le coefficient de Gini pour permettre la modification d’inégalité salariale. Résultats Quand le coefficient de Gini est égal à sa moyenne (0,294), le rapport est associé avec des conditions de santé désirables pour hommes et femmes adultes. Par example, en femmes, une augmentation de
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