Source: Annual Congress 2009 - Prognosis and comorbidities in COPD
Disease area: Airway diseases

Abstract

The level of physical activity influences directly on mortality in COPD.The tools used to establish the degree of physical activity are complex to apply in the daily practice.
Objective:To check whether the use of a simple scale of physical activity was related with mortality in a sample of patients with COPD.
Method:We prospectively included 611 patients during one year.At the beginning we recorded sociodemographic variables and lung function paramethers.Physical activity(Saltin Circulation 1968,Garcia-Aymerich Thorax 2006)was classified into 3 levels.

General features

Physical activity	Low(95)	Moderate(329)	High(187)	p Value
Age	67.7±7.7	68.6±7.2	62.9±9.6	<0.0001
FEV1(%)	45.3±16.1	49.5±14.2	52.3±13.9	<0.0001
Smoking(%)	53.9±30.1	47.6±29.9	44.7±25.1	0.04
Admissions				0.04
0	45(47.4)	195(59.3)	147(78.6)
1	29(30.5)	76(23.1)	26(13.9)
≤2	21(22.1)	58(17.6)	14(7.5)
Respiratory mortality	38(43.2)	49(17.5)	10(5.7)	<0.0001

Patients monitoring was conducted over 5 years by registering their vital status.
Results:The multivariate analysis adjusted by FEV1,age,smoking,admissions shows the previous physical activity as an independent predictor of survival.

Survival and physical activity

	OR	IC (95%)
Physical activity
Low vs High	0.15	0.06-0.34
Moderate vs High	0.46	0.21-0.98
FEV1	1.06	1.04-1.08
Age	0.93	0.9-0.96
Smoking	0.98	0.98-0.99
Admissions	0.63	0.49-0.81

Multivariate analysis

Conclusion:Physical activity measured by a simple questionnaire is associated independently with mortality of respiratory causes.

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Citations should be made in the following way:
M. Egurrola, C. Esteban, M. Aburto, J. Moraza, A. Capelastegui (Galdakao, Spain). Influence of daily selfreported physical activity on the survival of patients with COPD. Eur Respir J 2009; 34: Suppl. 53, 510

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