measurement
身体運動を測定する単一の質問。信頼性は (r=0.72-0.82), 妥当性は、the current physical activity recommendation (kappa=0.63, 95% CI 0.54 to 0.72). Global Physical Activity Questionnaire (r=0.53), Active People Survey (r=0.33-0.48)とまずまず。
質問文は、「過去一週間/一ヶ月で、あなたは計30分以上の呼吸が激しくなる運動を何日行いましたか。運動にはスポーツ、エクササイズ、早歩き、レクレーションのサイクリングを含めます。ただ、家事や仕事での身体活動は含めません。回答は、オープンな選択枝とし、過去一週間を聞くバージョンは回答を0～7日、過去一ヶ月間を聞く場合は回答を0～31日とします。
"In the past week/past month, on how many days have you done a total 30 minutes or more of physical activity, which was enough to raise your breathing rate. This may include sport, exercise, and brisk walking or cycling for recreation or to get to and from places, but should not include housework or physical activity that may be part of your job". An open-response scale was used, with valid responses ranging from 0 to 7 days for the past-week version and from 0 to 31 days for the past-month version.
Br J Sports Med. 2011 Mar;45(3):203-8. doi: 10.1136/bjsm.2009.068395. Epub 2010 May 19.
Reliability and validity testing of a single-item physical activity measure.
Abstract
To develop and test a new single-item physical activity screening tool, suitable for assessing respondents' eligibility for behaviour change interventions.
Two single-item assessment tools were developed, one using a "past week" recall period, the other using a "past month" recall period. A quota sampling system was used to recruit 480 adults from across England, Scotland and Wales. Half the sample completed the past-week question and half completed the past-month version. Test-retest reliability was assessed over a 2- to 5-day period. Concurrent validity was assessed using the Global Physical Activity Questionnaire and the UK Active People Survey. All surveys were completed via telephone interviews.
Both versions of the single-item instrument demonstrated strong reproducibility (r=0.72-0.82), using Spearman's rank correlation coefficients. The past-week recall question showed strong agreement in the classification of respondents meeting the current physical activity recommendation (kappa=0.63, 95% CI 0.54 to 0.72).Concurrent validity over the past week compared to the Global Physical Activity Questionnaire was modest (r=0.53) and slightly weaker for the past month compared to the Active People Survey (r=0.33-0.48).
Both versions of the new single-item measure performed as well as other short physical activity tools in terms of reliability and concurrent validity. Criterion validity testing of the single-item measure is recommended to establish its ability to assess objectively measured physical activity levels. In addition, further research to assess the responsiveness of the single-item measure in detecting changes in physical activity will inform its usefulness in programme evaluation.
J Paediatr Child Health. 2015 Feb 3. doi: 10.1111/jpc.12836. [Epub ahead of print]
Reliability and validity of a single-item physical activity measure for adolescents.
Scott JJ1, Morgan PJ, Plotnikoff RC, Lubans DR.
Abstract
The aim of this study was to examine the test-retest reliability and concurrent validity of an adolescent single-item physical activity measure by comparing it with the existing Oxford Physical Activity Questionnaire (OPAQ) and accelerometer output.
Participants were 123 adolescents (14.7 ± 0.5 years) from three secondary schools in New South Wales, Australia. To determine reliability, participants completed both questionnaires on two occasions separated by 2 weeks. To assess validity, participants wore Actigraph GT3X+ accelerometers for a 7-day monitoring period and completed both physical activity questionnaires. Bivariate correlations between self-reported moderate-to-vigorous physical activity (MVPA) and accelerometer MVPA min/day were calculated.
The single-item (intra-class correlation coefficient (ICC) = 0.75, 95% confidence interval (CI) = 0.64-0.83, P < 0.001) ) and the OPAQ (ICC = 0.79, 95% CI = 0.69-0.86, P < 0.001) were both found to have moderate-to-strong reliability. Correlations between self-reported and objectively measured MVPA were similar for the single-item measure (r = 0.44, 95% CI = 0.24-0.63, P < 0.001) and the OPAQ (r = 0.50, 95% CI = 0.30-0.65, P < 0.001).
These findings suggest the single-item measure can provide a reliable and valid assessment of youth physical activity.
OBJECTIVE:
DESIGN:
RESULTS:
RESULTS:
CONCLUSION:
AIMS:
METHODS:
CONCLUSIONS: