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Question clinique
Is the daily step count and/or the intensity of the steps associated with the risk of premature mortality?
L’Essentiel
This study found that a greater number of daily steps was significantly associated with lower all-cause mortality. Step intensity was not significantly associated with mortality after controlling for total daily steps. 1b
Référence
Plan de l'etude: Cohort (prospective)
Financement: Foundation
Cadre: Population-based
Sommaire
These investigators reviewed data obtained from the National Health and Nutrition Examination Survey (NHANES) focusing on participants who were asked to wear a hip accelerometer during waking hours for a 7-day period from 2003 to 2006. Individuals with at least 1 day of valid wear (at least 10 hours) were included. Additional data collection included demographic information (eg, age, gender, education), smoking status, alcohol intake, and diagnoses of chronic medical conditions (eg, diabetes, heart disease, stroke, cancer, chronic bronchitis). In addition to counting steps, step intensity was estimated based on extended bouts of stepping and peak 1-minute and 30-minute cadences. Assessments of mortality occurred via the US National Death Index. Participants (N = 4840) took a mean of 9124 steps per day. The incidence of all-cause mortality was 76.7 per 1000 person-years for individuals who took fewer than 4000 steps per day; 21.4 per 1000 person-years for individuals who took 4000 to 7999 steps per day; 6.9 per 1000 person-years for the individuals who took 8000 to 11,999 steps per day; and 4.8 per 1000 person-years for individuals who took at least 12,000 steps per day. After controlling for total steps per day, greater step intensity was not significantly associated with lower mortality.
Reviewer
David C. Slawson, MD
Professor and Vice Chair of Family Medicine for Education and Scholarship
Atrium Health
Professor of Family Medicine, UNC Chapel Hill
Charlotte, NC
Commentaires
good to see some number in terms of benefit to go with the step
will aim for 8000 steps daily.