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Peak expiratory flow, walking speed and survival in older adults : An 18-year longitudinal population-based study
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- Trevisan, Caterina (author)
- Karolinska Institutet,Stockholms universitet,Centrum för forskning om äldre och åldrande (ARC), (tills m KI),University of Padova, Italy
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- Rizzuto, Debora (author)
- Karolinska Institutet,Stockholms universitet,Centrum för forskning om äldre och åldrande (ARC), (tills m KI),Stockholm Gerontology Research Center, Sweden
- Sergi, Giuseppe (author)
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- Maggi, Stefania (author)
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- (creator_code:org_t)
- Elsevier BV, 2020
- 2020
- English.
- In: Experimental Gerontology. - : Elsevier BV. - 0531-5565 .- 1873-6815. ; 135
- Journal article (peer-reviewed)
Abstract
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- Background: Peak expiratory flow (PEF) and walking speed (WS) have been proposed as indicators of robustness and are independent predictors of health-related outcomes. We aimed to investigate how the co-occurrence of respiratory and physical impairments changes as a function of age, and to quantify the association of the combination of low PEF and slow WS on survival in older people.Methods: This prospective study analyzes data from 2656 community-dwelling participants (age >= 60 years) from the SNAC-K study. At baseline, we assessed: (1) sociodemographic, lifestyle and medical data; (2) respiratory function, estimated through PEF and expressed as standardized residual (SR) percentile; and (3) WS at usual pace, categorized as no (> 1.2 m/s), mild (0.8-1.2 m/s) and moderate-to-severe (< 0.8 m/s) walking impairment. Participants' vital status over an 18-year follow-up was derived from registers. The association of different combinations of PEF and WS on median survival time was estimated through Laplace regression adjusted for potential confounders.Results: Respiratory and walking impairments co-occurred more frequently with increasing age. Among individuals with PEF SR-percentiles < 10th, the percentage of moderate-to-severe walking impairment was 12.1% in sexagenarians, 35.7% in septuagenarians, and 75-80% in the oldest old. The greatest reduction in median survival time (- 5.4 [95%CI: -6.4; -4.4] years, p < 0.001) was observed among people with combined respiratory and moderate-to-severe walking impairments, compared with those with no dysfunctions, who had a median survival time of 17.4 (95%CI: 17.0; 17.8) years.Conclusions: Impaired PEF and WS co-occur more frequently with advancing age, and their co-occurrence is associated with shorter survival.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Geriatrik (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Geriatrics (hsv//eng)
Keyword
- Respiratory function
- Walking speed
- Survival
- Aging
Publication and Content Type
- ref (subject category)
- art (subject category)
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