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Change in household income and risk for attention deficit hyperactivity disorder during childhood: A nationwide population-based cohort study

Authors
 Young Choi  ;  Jaeyong Shin  ;  Kyoung Hee Cho  ;  Eun-Cheol Park 
Citation
 Journal of Epidemiology, Vol.27(2) : 56-62, 2017 
Journal Title
 Journal of Epidemiology 
ISSN
 0917-5040 
Issue Date
2017
MeSH
Attention Deficit Disorder with Hyperactivity/epidemiology* ; Child ; Child, Preschool ; Cohort Studies ; Health Status Disparities* ; Humans ; Income/statistics & numerical data* ; Infant ; Infant, Newborn ; Proportional Hazards Models ; Republic of Korea/epidemiology ; Risk Factors ; Social Class
Keywords
Attention deficit hyperactivity disorder ; Korean newborn infant ; Longitudinal study ; Socioeconomic status
Abstract
BACKGROUND: Childhood attention deficit hyperactivity disorder (ADHD) is reported to be more prevalent among socioeconomically disadvantaged groups in various countries. The effect of poverty on child development appears to depend on how long poverty lasts. The timing of poverty also seems to be important for childhood outcomes. Lifetime socioeconomic status may shape current health. Thus, we investigated the effects of household income changes from birth to 4 years on the occurrence of ADHD. METHODS: Data were obtained from 18,029 participants in the Korean National Health Insurance cohort who were born in 2002 and 2003. All individuals were followed until December 2013 or the occurrence of ADHD, whichever came first. Household income trajectories were estimated using the national health insurance premium and the group-based model. Cox proportional hazard models were used to compare incidence rates between different income trajectory groups after adjustment for possible confounding risk factors. RESULTS: Of 18,029 participants, 554 subjects (3.1%) were identified as having ADHD by age 10 or 11. Seven household income trajectories within three categories were found. Children living in decreasing, consistently low, and consistently mid-low income households had an increased risk of ADHD compared to children who consistently lived in the mid-high household income group. CONCLUSIONS: Children who live in decreasing-income or consistently low-income households have a higher risk for ADHD. Promotion of targeted policies and priority support may help reduce ADHD in this vulnerable group.
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DOI
10.1016/j.je.2016.09.004
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Preventive Medicine and Public Health (예방의학교실) > 1. Journal Papers
Yonsei Authors
박은철(Park, Eun-Cheol) ORCID logo https://orcid.org/0000-0002-2306-5398
신재용(Shin, Jae Yong)
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URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/154167
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