School of Public Health and Management, Chongqing Medical University, Chongqing, China.
West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, China.
BMJ Open. 2021 Nov 26;11(11):e049508. doi: 10.1136/bmjopen-2021-049508.
This study aims to assess the independent and combined associations between multiple lifestyle behaviours and academic grades of inner urban high school students (IUHSSs) and peri-urban high school students (PUHSSs).
A cross-sectional study was conducted.
There are 1481 high school students (49.9% boys) in this study, who were enrolled from one inner urban and two peri-urban schools in Chongqing, China.
Academic grades were assessed based on the students' self-reported grade ranking in the last cumulative examination.
In IUHSSs and PUHSSs, high frequency of sugar-sweetened beverage consumption was unlikely to obtain high academic grades (OR 0.56, 95% CI 0.32 to 0.99 and 0.63, 95% CI 0.42 to 0.96), respectively). Among IUHSSs, meeting the recommendations for weekday screen time and egg consumption (OR 1.57, 95% CI 1.06 to 2.34 and 1.60, 95% CI 1.04 to 2.47, respectively) and high frequency of fruit consumption (1.67, 95% CI 1.11 to 2.50) were significantly associated with high academic grades; meeting the recommendation for weekday sleep duration was unlikely to obtain high academic grades (0.46, 95% CI 0.21 to 0.98). Among PUHSSs, meeting the recommendations for weekend sleep duration (1.40, 95% CI 1.02 to 1.93) and eating dinner regularly (1.55, 95% CI 1.01 to 2.37) had significant associations with high academic grades. No significant associations were found between physical activity and academic grades in both IUHSSs and PUHSSs (p>0.05). Moreover, IUHSSs with 9-13 healthy lifestyle behaviours were 3.25 times more likely to achieve high academic grades than IUHSSs with 1-6 healthy lifestyle behaviours (3.25, 95% CI 1.96 to 5.40). No significant associations were found in the combined associations between multiple lifestyle behaviours and academic grades among PUHSSs (p>0.05).
Correlations were observed between lifestyle behaviours and academic grades among high school students, and cumulative associations between multiple healthy lifestyle behaviours and academic outcomes appear to be stronger than the independent associations. These findings are particularly applicable to IUHSSs.
本研究旨在评估内城区高中生（IUHSS）和近城区高中生（PUHSS）多种生活方式行为与学业成绩的独立和综合关联。
这是一项横断面研究。
本研究共纳入来自中国重庆一所内城区和两所近城区学校的 1481 名高中生（49.9%为男生）。
学业成绩根据学生最近一次累计考试中的自我报告成绩排名进行评估。
在内城区和近城区高中生中，频繁摄入含糖饮料不太可能获得高学业成绩（OR 0.56，95%CI 0.32 至 0.99 和 0.63，95%CI 0.42 至 0.96）。在内城区高中生中，符合工作日屏幕时间和鸡蛋摄入量建议（OR 1.57，95%CI 1.06 至 2.34 和 1.60，95%CI 1.04 至 2.47）以及高水果摄入量（1.67，95%CI 1.11 至 2.50）与高学业成绩显著相关；符合工作日睡眠时长推荐不太可能获得高学业成绩（0.46，95%CI 0.21 至 0.98）。在近城区高中生中，符合周末睡眠时长推荐（1.40，95%CI 1.02 至 1.93）和规律进食晚餐（1.55，95%CI 1.01 至 2.37）与高学业成绩显著相关。在 IUHSS 和 PUHSS 中，体力活动与学业成绩之间均无显著关联（p>0.05）。此外，与 IUHSS 有 1-6 种健康生活方式行为相比，有 9-13 种健康生活方式行为的 IUHSS 获得高学业成绩的可能性高 3.25 倍（3.25，95%CI 1.96 至 5.40）。在近城区高中生中，多种生活方式行为与学业成绩之间的联合关联无显著相关性（p>0.05）。
高中生的生活方式行为与学业成绩之间存在相关性，多种健康生活方式行为的累积关联似乎比独立关联更具影响力。这些发现对内城区高中生尤其适用。
