Correlation analysis of sleep behavior and overweight and obesity in junior high school students
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摘要:
目的 分析扬州市初中生睡眠行为现状及与超重肥胖的关联, 为青少年健康管理相关政策及干预措施制定提供依据。 方法 采用便利整群抽样法抽取扬州市区2所初中学校1 589名在校学生, 调查并分析睡眠时间、就寝时间、社会时差及睡眠习惯情况。 结果 1 589名初中生中, 上学期间睡眠不足率为64.38%, 就寝过晚率为86.78%, 46.51%的学生社会时差≥1 h, 37.44%的学生每天午睡(包括节假日)。社会时差时长在不同年级间差异有统计学意义(F=6.97), 女生高于男生(t=6.19)(P值均 < 0.01)。二元Logistic回归分析显示, 周末就寝时间晚、周末唤醒时间晚及睡眠行为不良与初中生超重肥胖发生均呈正相关(OR值分别为1.20, 1.14, 1.04, P值均 < 0.05)。 结论 初中生随年级增长睡眠时间减少、就寝时间更晚, 周末就寝时间和唤醒时间、不良的睡眠行为与初中生超重肥胖风险独立相关。需指导家长和学校关注青少年睡眠健康, 开展青少年睡眠健康指导及干预。 Abstract:Objective To analyze the association between different sleep behaviors and overweight and obesity of junior high school students in Yangzhou City, and to provide a basis for policies and interventions related to adolescent health management. Methods A total of 1 589 students in grades 7-9 from two middle schools in Yangzhou City were selected using the cluster sampling method and were administered with sleep time, bedtime, social jetlag difference, and sleep habits. Results Totally 64.38% were sleep-deprived during the school days, 86.78% went to bed too late, 46.51% had a social jetlag of ≥1 h, and 37.44% took a nap every day(Incluldes holidays and school days). Social jetlag length was statistically different between grades(F=6.97, P < 0.01). Girls shown significantly higher social jetlag than the boys(t=6.19, P < 0.01). Later bedtime on weekends, later wake-up time on weekends and poor sleep behavior were risk factors for overweight and obesity in junior high school students(OR=1.20, 1.14, 1.04, P < 0.05). Conclusion Junior high school students had less sleep and later bedtimes with the increase of grade, and weekend bedtimes, wake-up times and poor sleep behavior were independently associated with the risk of overweight and obesity in junior high school students. Parents and schools should be instructed to pay attention to their sleep health and carry out adolescent sleep health guidance. -
Key words:
- Sleep /
- Behavior /
- Overweight /
- Obesity /
- Regression analysis /
- Students
1) 利益冲突声明 所有作者声明无利益冲突。 -
表 1 不同年级初中生夜间及中午睡眠时间上学期间和周末假期间比较(x±s)
Table 1. Comparison of nighttime and midday sleep time for junior high school students at different grade levels during the school day and weekend vacations(x±s)
年级 人数 夜间睡眠时间/h 就寝时间 每天午睡时间/min* 上学期间 周末假期 t值 P值 上学期间 周末假期 t值 P值 上学期间 周末假期 Z值 P值 七 485 8.44±0.84 9.73±1.40 19.05 <0.01 21:46±0.75 21:57±1.06 3.83 <0.01 30(20) 20(40) 3.99 <0.01 八 668 7.96±0.90 9.46±1.40 26.71 <0.01 22:15±0.83 22:22±1.16 2.80 <0.01 40(20) 20(40) 9.06 <0.01 九 436 7.40±0.78 9.16±1.37 24.44 <0.01 22:50±0.74 22:39±1.09 3.59 <0.01 30(10) 5(30) 9.26 <0.01 F/H值 173.72 19.58 212.14 44.76 32.37 8.42 P值 <0.01 <0.01 <0.01 <0.01 <0.01 <0.05 注:*中位数(四分位数间距)。 表 2 不同特征初中生社会时差程度分布比较
Table 2. Comparison of distribution of the SJL among junior high school students with different characteristics
组别 选项 正常 大 非常大 χ2值 P值 BMI 消瘦 19 31 1 23.19 < 0.01 正常 469 420 32 超重 160 132 10 肥胖 202 105 8 性别 男 501 311 22 30.62 <0.01 女 349 377 29 年级 七 270 203 12 8.45 0.08 八 371 276 21 九 209 209 18 表 3 不同年级初中生社会时差时长及睡眠习惯问卷得分比较(x±s)
Table 3. Comparison the SLJ length and sleep habits questionnaire scores among junior high school students of different grades(x±s)
年级 人数 社会时差/h 睡眠习惯问卷总分 睡眠节律 睡眠习惯 七 485 0.80±0.57 9.38±3.42 4.23±1.96 5.15±2.49 八 668 0.83±0.64 8.85±3.34 3.65±1.84 5.21±2.31 九 436 0.95±0.67 10.04±2.74 4.68±1.60 5.36±2.12 F值 6.97 18.20 44.55 1.02 P值 < 0.01 <0.01 <0.01 0.36 表 4 初中生睡眠行为与超重肥胖的Logistic回归分析(n=1 589)
Table 4. Logistic regression analysis of sleep behavior and overweight and obesity in junior high school students(n=1 589)
自变量 β值 标准误 Wald χ2值 P值 OR值(OR值95%CI) 性别 -0.82 0.11 54.54 <0.01 0.44(0.35~0.55) 年龄 -0.34 0.08 18.07 <0.01 0.72(0.61~0.84) 上学期间睡眠时间 0.01 0.16 0.00 0.96 1.01(0.74~1.38) 周末唤醒时间 0.13 0.05 7.35 < 0.01 1.14(1.04~1.25) 上学就寝时间 0.28 0.17 2.61 0.11 1.32(0.94~1.85) 周末就寝时间 0.07 0.06 8.45 < 0.01 1.20(1.06~1.36) 睡眠习惯问卷总分 0.06 0.02 5.42 0.02 1.04(1.01~1.09) 睡眠节律得分 0.07 0.06 1.14 0.29 1.07(0.95~1.20) -
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