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首页> 外文期刊>Journal of physical activity & health >Understanding of the Single-Item Physical Activity Question for Population Surveillance
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Understanding of the Single-Item Physical Activity Question for Population Surveillance

机译：Understanding of the Single-Item Physical Activity Question for Population Surveillance

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摘要

Background: Sport New Zealand conducts continuous representative "Active NZ" surveys. Between 2019 and 2020 (n =13,887), these surveys asked International Physical Activity Questionnaire (IPAQ)-long-form questions, the single -item days (SI-days) per week question, and 1 question on hours per week (single-item hours SI-hours per week). This study examines relationships between the established SI-days question and meeting physical activity (PA) guidelines (150 min moderate-to-vigorous physical activity per week from SI-hours question and IPAQ). Methods: Analyses were descriptive, and the best fit between SI-days and the PA thresholds was estimated using area under the receiver operator characteristic curves and Youden index. Results: Using SI-hours, 60.6 achieved 150+ minutes; 85.2 reported the IPAQ-total minimum threshold, and 40.8 met the IPAQ-leisure time PA-only threshold. Receiver operator characteristic analyses showed area under the curve values with IPAQ between 0.63 and 0.76, but the SI-days showed a very good area under the curve of 0.82 (0.81-0.83) with the SI-hours 150-minute threshold. Youden index suggested the best fit was at 3+ days per week for maximizing Sensitivity and Specificity to meet IPAQ or SI-hours-defined PA guidelines. Discussion: The SI-days per week question reflects achieving PA guidelines, and the best fit was with the SI-hours per week question. This provides surveillance-relevant concurrent validity for the SI-days measure, but the cut point for broadly meeting guidelines appears to be at least 3 days per week, not 5 days per week as previously thought.

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