期刊
AMERICAN JOURNAL OF EPIDEMIOLOGY
卷 183, 期 4, 页码 315-324出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/aje/kwv211
关键词
cohort studies; confounding factors; health status; income; New Zealand; parents; public policy
资金
- Health Research Council of New Zealand through the Burden of Disease Epidemiology, Equity and Cost-Effectiveness Program [10/248]
- Health Inequalities Research Program [08/048]
- University of Otago through a Doctoral Scholarship
- Elman Poole Travelling Scholarship
- Health Sciences Career Development Programme Postdoctoral Fellowship
- Harvard School of Public Health through a Visiting Scientist Fellowship
- Fulbright New Zealand through a Fulbright-Ministry of Science and Innovation Graduate Award [15120390]
In previous studies, researchers estimated short-term relationships between financial credits and health outcomes using conventional regression analyses, but they did not account for time-varying confounders affected by prior treatment (CAPTs) or the credits' cumulative impacts over time. In this study, we examined the association between total number of years of receiving New Zealand's Family Tax Credit (FTC) and self-rated health (SRH) in 6,900 working-age parents using 7 waves of New Zealand longitudinal data (2002-2009). We conducted conventional linear regression analyses, both unadjusted and adjusted for time-invariant and time-varying confounders measured at baseline, and fitted marginal structural models (MSMs) that more fully adjusted for confounders, including CAPTs. Of all participants, 5.1%-6.8% received the FTC for 1-3 years and 1.8%-3.6% for 4-7 years. In unadjusted and adjusted conventional regression analyses, each additional year of receiving the FTC was associated with 0.033 (95% confidence interval (CI): -0.047, -0.019) and 0.026 (95% CI: -0.041, -0.010) units worse SRH (on a 5-unit scale). In the MSMs, the average causal treatment effect also reflected a small decrease in SRH (unstabilized weights: beta = -0.039 unit, 95% CI: -0.058, -0.020; stabilized weights: beta = -0.031 unit, 95% CI: -0.050, -0.007). Cumulatively receiving the FTC marginally reduced SRH. Conventional regression analyses and MSMs produced similar estimates, suggesting little bias from CAPTs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据