TY - JOUR
T1 - Combined healthy lifestyle behaviours and incident disability in an elderly population
T2 - The Ohsaki Cohort 2006 Study
AU - Zhang, Shu
AU - Tomata, Yasutake
AU - Newson, Roger B.
AU - Sugawara, Yumi
AU - Tsuji, Ichiro
N1 - Funding Information:
This work was supported by Health Sciences Research grants (no. H28-Junkankitou-Ippan-008) from the Ministry of Health, Labour and Welfare of Japan.
Publisher Copyright:
© Article author(s) 2018. All rights reserved.
PY - 2018/8/1
Y1 - 2018/8/1
N2 - Background: The joint impact of healthy lifestyle behaviours (HLBs) on incident disability among elderly populations is still uncertain. This cohort study was conducted to estimate the population-attributable fraction (PAF) of combined HLBs for disability reduction in elderly Japanese. Methods: We analysed 10-year follow-up data for 9910 community-dwelling elderly people (≥65 years) in a prospective cohort study. Information on lifestyle behaviours and food consumption was collected via a questionnaire in 2006. The exposure variable was defined as a healthy lifestyle index (HLI), which represented the summed number of HLBs ('never or former smoker', 'time spent walking ≥0.5 hour/day' and 'vegetable and fruit consumption volume ≥median'). Data on incident disability were retrieved from the public Long term Care Insurance database. HRs and 95% CIs were estimated by Cox proportional regression and the PAFs and their 95% CIs were estimated with the multivariate-adjusted model. Results: The 10-year incidence of disability was 35.7%. An inverse dose-response relationship was observed (HR (95% CI): 0.85(0.81 to 0.90) for each one-point increase of the HLI score, p-trend <0.001). Based on multivariate-adjustment, adherence to each one additional HLB gives PAF of 10.5%(95% CI 9.0% to 12.0%) for disability reduction. The PAF would have been 25.9%(14.2% to 36.0%) if all subjects had adhered to all three HLBs. Conclusion: Combined HLBs may have a substantial impact on reducing the risk of incident disability among elderly people. Even having one more healthy lifestyle habit may bring considerable benefit.
AB - Background: The joint impact of healthy lifestyle behaviours (HLBs) on incident disability among elderly populations is still uncertain. This cohort study was conducted to estimate the population-attributable fraction (PAF) of combined HLBs for disability reduction in elderly Japanese. Methods: We analysed 10-year follow-up data for 9910 community-dwelling elderly people (≥65 years) in a prospective cohort study. Information on lifestyle behaviours and food consumption was collected via a questionnaire in 2006. The exposure variable was defined as a healthy lifestyle index (HLI), which represented the summed number of HLBs ('never or former smoker', 'time spent walking ≥0.5 hour/day' and 'vegetable and fruit consumption volume ≥median'). Data on incident disability were retrieved from the public Long term Care Insurance database. HRs and 95% CIs were estimated by Cox proportional regression and the PAFs and their 95% CIs were estimated with the multivariate-adjusted model. Results: The 10-year incidence of disability was 35.7%. An inverse dose-response relationship was observed (HR (95% CI): 0.85(0.81 to 0.90) for each one-point increase of the HLI score, p-trend <0.001). Based on multivariate-adjustment, adherence to each one additional HLB gives PAF of 10.5%(95% CI 9.0% to 12.0%) for disability reduction. The PAF would have been 25.9%(14.2% to 36.0%) if all subjects had adhered to all three HLBs. Conclusion: Combined HLBs may have a substantial impact on reducing the risk of incident disability among elderly people. Even having one more healthy lifestyle habit may bring considerable benefit.
KW - disability
KW - epidemiology of ageing
KW - health behaviour
KW - health impact assessment
KW - lifestyle
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U2 - 10.1136/jech-2018-210464
DO - 10.1136/jech-2018-210464
M3 - Article
C2 - 29627784
AN - SCOPUS:85049209109
VL - 72
SP - 679
EP - 684
JO - Journal of Epidemiology and Community Health
JF - Journal of Epidemiology and Community Health
SN - 0143-005X
IS - 8
ER -