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November 4, 2021Scientific Reports44 citationsOpen Access

The ability of physical activity in reducing mortality risks and cardiovascular loading and in extending life expectancy in patients with COPD

CSChin‐Chung ShuJLJune Han LeeMTMin‐Kuang Tsai

Key Result

Fully active physical activity reduced all-cause mortality in patients with COPD, lowering the hazard ratio from 1.40 in inactive patients to 1.10, a level comparable to inactive individuals without COPD.

Study Design

Type

Cohort (n=483,603)

Structured PICO

Does fully active physical activity reduce mortality and improve life expectancy in patients with COPD?

P
Population
483,603 adults aged 20 years or older participating in a standard health-screening program in Taiwan, including 32,535 with spirometry-determined COPD (FEV1/FVC < 0.70).
I
Intervention
Fully active physical activity (≥30 min a day or ≥7.5 MET-hours/week)
C
Comparator
Inactive physical activity (<15 min a day or <3.75 MET-hours/week) or low active physical activity (15-29 min a day or 3.75-7.49 MET-hours/week)
O
Outcome
All-cause mortality at median 8.8 years follow-uphard clinical

In patients with COPD, engaging in fully active physical activity is associated with reduced all-cause and cardiovascular mortality, lower resting heart rates, and an extension of life expectancy comparable to individuals without COPD.

Main Result

Effect estimate: HR 1.10 (95% CI 0.9-1.2)

p-value: p=<0.05

Limitations

  • Observational study design prevents causal interpretation, with potential for reverse causality.
  • Definition of COPD was based on pre-bronchodilator spirometry rather than post-bronchodilator data.
  • Self-paid nature of the health surveillance program may have introduced selection bias toward higher socioeconomic classes.
  • Results were based on initial assessments of lung function and did not consider subsequent disease progression.
  • Evolution of COPD therapy during the long follow-up period might have influenced outcomes.
  • Physical activity information was self-reported, introducing potential recall bias.
  • Observational study design precluding causal interpretation
  • Definition of COPD not based on post-bronchodilator data
  • Self-paid health surveillance may introduce selection bias by attracting individuals of higher socioeconomic class
  • Based on initial assessments of lung function without considering subsequent disease course

Abstract

For chronic obstructive pulmonary disease (COPD), the role of physical activity in reducing COPD mortality and heart loading and in extending life expectancy remains unclear. Participants in comprehensive medical screening were recruited with spirometry on everyone. We analyzed physical activity volume calculated from intensity, duration and frequency of self-reported exercise history. Deaths were identified from the National Death File. The impacts of physical activity on mortality, heart rate and life expectancy were analyzed. Among the cohort of 483,603 adults, 32,535 had spirometry-determined COPD, indicating an adjusted national prevalence of 11.4% (male) and 9.8% (female). On the average, COPD increased all-cause mortality with a hazard ratio of 1.44 and loss of 6.0 years in life expectancy. Almost two thirds (65%) of the causes of deaths were extra-pulmonary, such as cardiovascular disease, diabetes, cancer and kidney diseases. In addition, COPD was associated with increases in heart rate proportionate to its severity, which led to higher mortality. Participants with COPD who were fully active physically could reduce mortality and have improved heart rates as compared with those without physical activity. In addition, their life expectancy could be extended close to those of the no COPD but inactive cohort. Fully active physical activity can help patients with COPD overcome most of the mortality risks, decrease heart rate, and achieve a life expectancy close to that of patients without COPD. The effectiveness of physical activity on COPD is facilitated by its systemic nature beyond lung disease.

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Cite This Study

Shu et al. (2021) conducted a cohort in Chronic obstructive pulmonary disease (COPD) (n=483,603). Fully active physical activity vs. Inactive physical activity (< 15 min a day, or < 3.75 MET-hours/week) was evaluated on All-cause mortality (HR 1.10, 95% CI 0.9-1.2, p=<0.05). Fully active physical activity reduced all-cause mortality in patients with COPD, lowering the hazard ratio from 1.40 in inactive patients to 1.10, a level comparable to inactive individuals without COPD.

synapsesocial.com/papers/6a087419280cd4e998e8c068https://doi.org/10.1038/s41598-021-00728-2
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