BACKGROUND: There is a wide variability in measurement methodology of physical activity. This study investigated the effect of different analysis techniques on the statistical power of physical activity outcomes aft er pulmonary rehabilitation. METHODS: Physical activity was measured with an activity monitor armband in 57 patients with COPD (mean +/- SD age, 66 +/- 7 years; FEV 1, 46 +/- 17% predicted) before and aft er 3 months of pulmonary rehabilitation. The choice of the outcome (daily number of steps [STEPS], time spent in at least moderate physical activity [TMA], mean metabolic equivalents of task level [METS], and activity time [ACT]), impact of weekends, number of days of assessment, post-processing techniques, and influence of duration of daylight time (DT) on the sample size to achieve a power of 0.8 were investigated. RESULTS: The STEPS and ACT (1.6-2.3 metabolic equivalents of task) were the most sensitive outcomes. Excluding weekends decreased the sample size for STEPS (83 vs 56), TMA (160 vs 148), and METS (251 vs 207). Using 4 weekdays (STEPS and TMA) or 5 weekdays (METS) rendered the lowest sample size. Excluding days with, 8 h wearing time reduced the sample size for STEPS (56 vs 51). Differences in DT were an important confounder. CONCLUSIONS: Changes in physical activity following pulmonary rehabilitation are best measured for 4 weekdays, including only days with at least 8 h of wearing time (during waking hours) and considering the difference in DT as a covariate in the analysis.
机构:
Cty Council Varmland, Primary Care Res Unit, Karlstad, Sweden
Uppsala Univ, Dept Med Sci Resp Med & Allergol, Uppsala, SwedenCty Council Varmland, Primary Care Res Unit, Karlstad, Sweden
Arne, Mats
;
Lundin, Fredrik
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Cty Council Varmland, Primary Care Res Unit, Karlstad, SwedenCty Council Varmland, Primary Care Res Unit, Karlstad, Sweden
Lundin, Fredrik
;
Boman, Gunnar
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机构:
Uppsala Univ, Dept Med Sci Resp Med & Allergol, Uppsala, SwedenCty Council Varmland, Primary Care Res Unit, Karlstad, Sweden
Boman, Gunnar
;
Janson, Christer
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h-index: 0
机构:
Uppsala Univ, Dept Med Sci Resp Med & Allergol, Uppsala, SwedenCty Council Varmland, Primary Care Res Unit, Karlstad, Sweden
Janson, Christer
;
Janson, Staffan
论文数: 0引用数: 0
h-index: 0
机构:
Cty Council Varmland, Primary Care Res Unit, Karlstad, Sweden
Karlstad Univ, Dept Social Sci, Div Publ Hlth, Karlstad, SwedenCty Council Varmland, Primary Care Res Unit, Karlstad, Sweden
Janson, Staffan
;
Emtner, Margareta
论文数: 0引用数: 0
h-index: 0
机构:
Uppsala Univ, Dept Med Sci Resp Med & Allergol, Uppsala, Sweden
Uppsala Univ, Dept Neurosci, Uppsala, SwedenCty Council Varmland, Primary Care Res Unit, Karlstad, Sweden
机构:
Inst Metab Sci, MRC, Epidemiol Unit, Cambridge, EnglandUniv Loughborough, Sch Sport Exercise & Hlth Sci, British Heart Fdn Natl Ctr Phys Act & Hlth, Loughborough, Leics, England
Brage, Soren
;
Salmon, Jo
论文数: 0引用数: 0
h-index: 0
机构:
Deakin Univ, Ctr Phys Act & Nutr Res, Burwood, AustraliaUniv Loughborough, Sch Sport Exercise & Hlth Sci, British Heart Fdn Natl Ctr Phys Act & Hlth, Loughborough, Leics, England
Salmon, Jo
;
Marshall, Simon J.
论文数: 0引用数: 0
h-index: 0
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San Diego State Univ, Sch Exercise & Nutr Sci, San Diego, CA 92182 USAUniv Loughborough, Sch Sport Exercise & Hlth Sci, British Heart Fdn Natl Ctr Phys Act & Hlth, Loughborough, Leics, England
Marshall, Simon J.
;
Biddle, Stuart J. H.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Loughborough, Sch Sport Exercise & Hlth Sci, Loughborough, Leics, England
Univ Loughborough, Univ Hosp Leicester, NIHR Leicester Loughborough Diet Lifestyle & Phys, Loughborough, Leics, EnglandUniv Loughborough, Sch Sport Exercise & Hlth Sci, British Heart Fdn Natl Ctr Phys Act & Hlth, Loughborough, Leics, England
机构:
Hosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, Spain
CIBER Enfermedades Resp CIBERES, Palma De Mallorca, SpainHosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, Spain
Garcia-Rio, Francisco
;
Rojo, Blas
论文数: 0引用数: 0
h-index: 0
机构:
Hosp Infanta Sofia, Secc Neumol, San Sebastian De Reyes, SpainHosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, Spain
Rojo, Blas
;
Casitas, Raquel
论文数: 0引用数: 0
h-index: 0
机构:
Hosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, SpainHosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, Spain
Casitas, Raquel
;
Lores, Vanesa
论文数: 0引用数: 0
h-index: 0
机构:
Hosp Infanta Leonor, Secc Neumol, Madrid, SpainHosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, Spain
Lores, Vanesa
;
Madero, Rosario
论文数: 0引用数: 0
h-index: 0
机构:
Hosp Univ La Paz, Secc Bioestadist, IdiPAZ, San Sebastian De Reyes, SpainHosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, Spain
Madero, Rosario
;
Romero, David
论文数: 0引用数: 0
h-index: 0
机构:
Hosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, SpainHosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, Spain
Romero, David
;
Galera, Raul
论文数: 0引用数: 0
h-index: 0
机构:
Hosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, SpainHosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, Spain
Galera, Raul
;
Villasante, Carlos
论文数: 0引用数: 0
h-index: 0
机构:
Hosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, SpainHosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, Spain
机构:
Cty Council Varmland, Primary Care Res Unit, Karlstad, Sweden
Uppsala Univ, Dept Med Sci Resp Med & Allergol, Uppsala, SwedenCty Council Varmland, Primary Care Res Unit, Karlstad, Sweden
Arne, Mats
;
Lundin, Fredrik
论文数: 0引用数: 0
h-index: 0
机构:
Cty Council Varmland, Primary Care Res Unit, Karlstad, SwedenCty Council Varmland, Primary Care Res Unit, Karlstad, Sweden
Lundin, Fredrik
;
Boman, Gunnar
论文数: 0引用数: 0
h-index: 0
机构:
Uppsala Univ, Dept Med Sci Resp Med & Allergol, Uppsala, SwedenCty Council Varmland, Primary Care Res Unit, Karlstad, Sweden
Boman, Gunnar
;
Janson, Christer
论文数: 0引用数: 0
h-index: 0
机构:
Uppsala Univ, Dept Med Sci Resp Med & Allergol, Uppsala, SwedenCty Council Varmland, Primary Care Res Unit, Karlstad, Sweden
Janson, Christer
;
Janson, Staffan
论文数: 0引用数: 0
h-index: 0
机构:
Cty Council Varmland, Primary Care Res Unit, Karlstad, Sweden
Karlstad Univ, Dept Social Sci, Div Publ Hlth, Karlstad, SwedenCty Council Varmland, Primary Care Res Unit, Karlstad, Sweden
Janson, Staffan
;
Emtner, Margareta
论文数: 0引用数: 0
h-index: 0
机构:
Uppsala Univ, Dept Med Sci Resp Med & Allergol, Uppsala, Sweden
Uppsala Univ, Dept Neurosci, Uppsala, SwedenCty Council Varmland, Primary Care Res Unit, Karlstad, Sweden
机构:
Inst Metab Sci, MRC, Epidemiol Unit, Cambridge, EnglandUniv Loughborough, Sch Sport Exercise & Hlth Sci, British Heart Fdn Natl Ctr Phys Act & Hlth, Loughborough, Leics, England
Brage, Soren
;
Salmon, Jo
论文数: 0引用数: 0
h-index: 0
机构:
Deakin Univ, Ctr Phys Act & Nutr Res, Burwood, AustraliaUniv Loughborough, Sch Sport Exercise & Hlth Sci, British Heart Fdn Natl Ctr Phys Act & Hlth, Loughborough, Leics, England
Salmon, Jo
;
Marshall, Simon J.
论文数: 0引用数: 0
h-index: 0
机构:
San Diego State Univ, Sch Exercise & Nutr Sci, San Diego, CA 92182 USAUniv Loughborough, Sch Sport Exercise & Hlth Sci, British Heart Fdn Natl Ctr Phys Act & Hlth, Loughborough, Leics, England
Marshall, Simon J.
;
Biddle, Stuart J. H.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Loughborough, Sch Sport Exercise & Hlth Sci, Loughborough, Leics, England
Univ Loughborough, Univ Hosp Leicester, NIHR Leicester Loughborough Diet Lifestyle & Phys, Loughborough, Leics, EnglandUniv Loughborough, Sch Sport Exercise & Hlth Sci, British Heart Fdn Natl Ctr Phys Act & Hlth, Loughborough, Leics, England
机构:
Hosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, Spain
CIBER Enfermedades Resp CIBERES, Palma De Mallorca, SpainHosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, Spain
Garcia-Rio, Francisco
;
Rojo, Blas
论文数: 0引用数: 0
h-index: 0
机构:
Hosp Infanta Sofia, Secc Neumol, San Sebastian De Reyes, SpainHosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, Spain
Rojo, Blas
;
Casitas, Raquel
论文数: 0引用数: 0
h-index: 0
机构:
Hosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, SpainHosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, Spain
Casitas, Raquel
;
Lores, Vanesa
论文数: 0引用数: 0
h-index: 0
机构:
Hosp Infanta Leonor, Secc Neumol, Madrid, SpainHosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, Spain
Lores, Vanesa
;
Madero, Rosario
论文数: 0引用数: 0
h-index: 0
机构:
Hosp Univ La Paz, Secc Bioestadist, IdiPAZ, San Sebastian De Reyes, SpainHosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, Spain
Madero, Rosario
;
Romero, David
论文数: 0引用数: 0
h-index: 0
机构:
Hosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, SpainHosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, Spain
Romero, David
;
Galera, Raul
论文数: 0引用数: 0
h-index: 0
机构:
Hosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, SpainHosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, Spain
Galera, Raul
;
Villasante, Carlos
论文数: 0引用数: 0
h-index: 0
机构:
Hosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, SpainHosp Univ La Paz, Serv Neumol, IdiPAZ, San Sebastian De Reyes, Spain