title: Stanford Seven-Day Physical Activity Recall questionnaire in COPD.
abstract: Quantification of daily physical activity is of clinical interest in chronic obstructive pulmonary disease (COPD). Objective measures using activity monitors may take several days to obtain reliable results. The aim of our study was to evaluate the Stanford Seven-Day Physical Activity Recall questionnaire (PAR) against the SenseWear armband (SWA) and compare its validity with three other physical activity questionnaires. 43 COPD patients wore the SWA for 7 days. Patients completed the PAR, Baecke, Physical Activity Scale for the Elderly (PASE) and Zutphen questionnaires. Spearman rank correlation, intraclass correlation coefficients (ICC) and receiver-operating characteristics (ROC) curves were used to assess the relationship between the questionnaires and SWA. Assessed by PAR, time spent at ≥3.0 metabolic equivalents (METs) correlated significantly (r=0.54, p<0.001) with equivalent measures from SWA, with an ICC of 0.40. No relationship was seen between the other questionnaires and the SWA. The PAR predicted active patients (≥30 min at ≥3.0 METs or a physical activity level (PAL) ≥1.55) and very inactive patients (PAL <1.40) with an area under ROC curve of 0.83, 0.77 and 0.70, respectively. While the PAR did not measure physical activity sufficiently accurately to make individual recommendations, it was able to identify COPD patients at extremes of the physical activity spectrum, potentially reducing the number of patients requiring direct measurement.
authors.affiliation: NIHR Respiratory Biomedical Research Unit, Royal Brompton and Harefield NHS Foundation Trust, London, UK. bgarfield@doctors.org.uk
authors.forename: Benjamin E
authors.initials: BE
authors.lastname: Garfield
authors.forename: Jane L
authors.initials: JL
authors.lastname: Canavan
authors.forename: Cayley J
authors.initials: CJ
authors.lastname: Smith
authors.forename: Karen A
authors.initials: KA
authors.lastname: Ingram
authors.forename: Ria P
authors.initials: RP
authors.lastname: Fowler
authors.forename: Amy L
authors.initials: AL
authors.lastname: Clark
authors.forename: Michael I
authors.initials: MI
authors.lastname: Polkey
authors.forename: William D-C
authors.initials: WD
authors.lastname: Man
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D004734:Energy Metabolism; D005260:Female; D006801:Humans; D008019:Life Style; D008297:Male; D011939:Mental Recall; D008875:Middle Aged; D009043:Motor Activity / Q000502:physiology; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis* / Q000503:physiopathology*; D012372:ROC Curve; D012984:Software; D011795:Surveys and Questionnaires