title: The Phone-FITT: a brief physical activity interview for older adults.
abstract: The purpose of this study was to develop a brief physical activity interview for older adults (Phone-FITT) and evaluate its test-retest reliability and validity. Summary scores were derived for household, recreational, and total PA. Reliability was evaluated in a convenience sample from a fall-prevention study (N = 43, 79.4 +/- 2.9 years, 51% male), and validity, in a random sample of individuals in older adult exercise programs (N = 48, 77.4 +/- 4.7 years, 25% male). Mean time to complete the Phone-FITT was 10 min for participants sampled from exercise programs. Evaluation of test-retest reliability indicated substantial to almost perfect agreement for all scores, with intraclass correlation coefficients (95% confidence intervals) ranging from .74 (.58-.85) to .88 (.8-.94). For validity, Spearman's rho correlations of Phone-FITT scores with accelerometer counts ranged from .29 (.01-.53) to .57 (.34-.73). Correlations of Phone-FITT recreational scores with age and seconds to complete a self-paced step test ranged from -.29 (-.53 to -.01) to -.45 (-.68 to -.14). This study contributes preliminary evidence of the reliability and validity of the Phone-FITT.
authors.affiliation: Dept. of Epidemiology and Biostatistics, University of Western Ontario, London, ON, Canada.
authors.forename: Dawn P
authors.initials: DP
authors.lastname: Gill
authors.forename: Gareth R
authors.initials: GR
authors.lastname: Jones
authors.forename: Guang Yong
authors.initials: GY
authors.lastname: Zou
authors.forename: Mark
authors.initials: M
authors.lastname: Speechley
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D015577:Geriatric Assessment; D006801:Humans; D007407:Interviews as Topic / Q000592:standards; D007899:Leisure Activities; D008297:Male; D009043:Motor Activity / Q000502:physiology*; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires / Q000592:standards