Household physical activity and mortality in older adults: a national cohort study in Spain.
OBJECTIVE
To examine the association between household physical activity (HPA) and all-cause mortality in a cohort of older adults from Spain, and the role of sedentary time on this association.


METHODS
Prospective cohort study of 2874 individuals aged ≥ 62 years. In 2003, the time spent in HPA and the time spent seated were self-reported. The association of HPA with all-cause mortality through 2011 was assessed with Cox regression.


RESULTS
During the follow-up, 970 participants died. In men, HPA was inversely associated with the risk of death only among those with longer sitting time (≥ 8 h/d): compared to those who did not do HPA, the mortality hazard ratio (HR) was 0.80 (95% confidence interval (CI): 0.60-1.08) and 0.43 (95% CI: 0.27-0.69) for those who spent >0 to 2h/d and >2h/d in HPA, respectively (P for trend<0.001). In women, sitting time did not modify the study association. Thus, compared to women who spent <2h/d in HPA, the HR for mortality was 0.72 (95% CI: 0.56-0.93) and 0.52 (95% CI: 0.39-0.70) for those who spent >2 to 4h/d, and >4h/d in HPA, respectively (P for trend<0.001).


CONCLUSIONS
In women, HPA is associated with reduced mortality regardless of sitting time. HPA may also contribute to longer survival among men with longer sitting time.
Department of Preventive Medicine and Public Health, School of Medicine, Universidad Autónoma de Madrid, Madrid, Spain; IdiPAZ-CIBER of Epidemiology and Public Health (CIBERESP), Madrid, Spain. Electronic address: d.martinez@uam.es.
David
D
Martínez-Gómez
Department of Preventive Medicine and Public Health, School of Medicine, Universidad Autónoma de Madrid, Madrid, Spain; IdiPAZ-CIBER of Epidemiology and Public Health (CIBERESP), Madrid, Spain.
Pilar
P
Guallar-Castillón
Department of Preventive Medicine and Public Health, School of Medicine, Universidad Autónoma de Madrid, Madrid, Spain; IdiPAZ-CIBER of Epidemiology and Public Health (CIBERESP), Madrid, Spain.
Luz M
LM
León-Muñoz
Department of Preventive Medicine and Public Health, School of Medicine, Universidad Autónoma de Madrid, Madrid, Spain; IdiPAZ-CIBER of Epidemiology and Public Health (CIBERESP), Madrid, Spain.
Fernando
F
Rodríguez-Artalejo
D000368:Aged; D000369:Aged, 80 and over; D000428:Alcohol Drinking / Q000453:epidemiology / Q000523:psychology; D015992:Body Mass Index; D015331:Cohort Studies; D005260:Female; D005500:Follow-Up Studies; D006304:Health Status; D006796:Household Work / Q000706:statistics & numerical data*; D006801:Humans; D007899:Leisure Activities; D008297:Male; D051346:Mobility Limitation; D009026:Mortality / Q000639:trends*; D009043:Motor Activity / Q000502:physiology*; D016016:Proportional Hazards Models; D011446:Prospective Studies; D012044:Regression Analysis; D057185:Sedentary Behavior; D012907:Smoking / Q000453:epidemiology / Q000523:psychology; D012959:Socioeconomic Factors; D013030:Spain / Q000453:epidemiology; D011795:Surveys and Questionnaires; D016019:Survival Analysis
Housework; Mortality; Physical activity; Sedentary time; Survival