Centre for Exercise, Nutrition and Health Sciences, School for Policy Studies, University of Bristol, Bristol, UK.
National Institute for Health Research (NIHR) Collaboration for Leadership in Applied Health Research and Care West (CLAHRC West) at University Hospitals Bristol NHS Foundation Trust, Bristol, UK.
BMJ Open. 2019 Jan 20;9(1):e024858. doi: 10.1136/bmjopen-2018-024858.
To compare the physical activity of adolescents with three common long-term conditions (asthma, eczema and obesity) with adolescents without these conditions.
Cross-sectional and longitudinal analyses of adolescents at ages 12, 14 and 16 in a large UK cohort study.
The Avon Longitudinal Study of Parents and Children.
6473 adolescents with complete accelerometer data at at least one time point.
Mean minutes of moderate to vigorous intensity physical activity (MVPA) and sedentary time per day were derived from accelerometer-based measurements at ages 12, 14 and 16. Obesity was defined at each time point from height and weight measurements. Parents reported doctor-assessed asthma or eczema. Cross-sectional and longitudinal regression models examined any differences in MVPA or sedentary time for adolescents with asthma, eczema or obesity compared with those without.
In longitudinal models, boys engaged in an average of 69.7 (95% CI 67.6 to 71.7) min MVPA at age 12, declining by 3.1 (95% CI 2.6 to 3.6) min/year while girls' average MVPA was 47.5 (95% CI 46.1 to 48.9) min at age 12, declining by 1.8 (95% CI 1.5 to 2.1) min/year. There was no strong evidence of differences in physical activity patterns of those with and without asthma or eczema. Obese boys engaged in 11.1 (95% CI 8.7 to 13.6) fewer minutes of MVPA, and obese girls in 5.0 (95% CI 3.3 to 6.8) fewer minutes than their non-obese counterparts. Cross-sectional models showed comparable findings.
Mean minutes of MVPA per day did not differ between adolescents with asthma or eczema and those without, but obese adolescents engaged in fewer minutes of MVPA. Findings reinforce the need for strategies to help obese adolescents be more active but suggest no need to develop bespoke physical activity strategies for adolescents with mild asthma or eczema.
比较患有三种常见慢性疾病（哮喘、湿疹和肥胖症）的青少年与无这些疾病的青少年的身体活动水平。
在一项大型英国队列研究中，对 12、14 和 16 岁的青少年进行横断面和纵向分析。
雅芳纵向父母与子女研究。
6473 名在至少一个时间点有完整加速度计数据的青少年。
使用加速度计测量值，得出每天中等到剧烈强度体力活动（MVPA）和久坐时间的平均分钟数，在 12、14 和 16 岁时进行测量。每个时间点根据身高和体重测量结果定义肥胖。父母报告了医生评估的哮喘或湿疹。横断面和纵向回归模型检查了与无这些疾病的青少年相比，患有哮喘、湿疹或肥胖症的青少年在 MVPA 或久坐时间方面的任何差异。
在纵向模型中，男孩在 12 岁时平均进行 69.7（95%置信区间 67.6 至 71.7）分钟的 MVPA，每年减少 3.1（95%置信区间 2.6 至 3.6）分钟；而女孩在 12 岁时的平均 MVPA 为 47.5（95%置信区间 46.1 至 48.9）分钟，每年减少 1.8（95%置信区间 1.5 至 2.1）分钟。患有哮喘或湿疹的青少年与无哮喘或湿疹的青少年的体力活动模式差异没有明显证据。肥胖男孩的 MVPA 时间减少了 11.1（95%置信区间 8.7 至 13.6）分钟，肥胖女孩减少了 5.0（95%置信区间 3.3 至 6.8）分钟。横断面模型显示了类似的发现。
患有哮喘或湿疹的青少年与无这些疾病的青少年相比，每天的 MVPA 平均分钟数没有差异，但肥胖青少年的 MVPA 时间较少。这些发现强调了需要制定帮助肥胖青少年更活跃的策略，但表明没有必要为轻度哮喘或湿疹的青少年制定专门的体力活动策略。
