Department of Neuropsychiatry, Ehime University Graduate School of Medicine, Toon City, Japan.
Center for Child Health, Behavior and Development, Ehime University Hospital, Toon City, Japan.
Pediatr Int. 2020 Aug;62(8):970-975. doi: 10.1111/ped.14250. Epub 2020 Jul 28.
Internet addiction is a serious problem, and the incidence has increased significantly in recent years. In two cross-sectional studies over a 4-year period, we investigated Internet addiction in adolescents and evaluated the resulting changes in their lives.
Junior high-school students (aged 12 to 15 years) were assessed in 2014 (survey I) and in 2018 (survey II). They filled out Young's Internet Addiction Test (IAT), the Japanese version of the General Health Questionnaire, and a questionnaire on sleep habits and usage of electric devices.
In total, 1,382 students were recruited for the two surveys. The mean IAT score was significantly higher in survey II (36.0 ± 15.2) than in survey I (32.4 ± 13.6) (P < 0.001). The increase in total IAT score indicates that the rate of Internet addiction was significantly higher in 2018 than in 2014. For each subscale of the General Health Questionnaire, social dysfunction scores were significantly lower in survey II than in survey I (P = 0.022). During the weekend, mean total sleep time was 504.8 ± 110.1 min, and the time awake was 08:02 h in survey II; the total sleep time and time awake were significantly longer and later, respectively, in survey II than in survey I (P < 0.001, P = 0.004, respectively). Smartphone use was also significantly higher in survey II than in survey I (P < 0.001).
The prevalence of Internet addiction differed over the 4 years of this study.
网络成瘾是一个严重的问题，近年来其发病率显著上升。在为期 4 年的两项横断面研究中，我们调查了青少年的网络成瘾情况，并评估了由此导致的生活变化。
初中学生（12 至 15 岁）于 2014 年（调查 I）和 2018 年（调查 II）进行评估。他们填写了 Young 的网络成瘾测试（IAT）、日本版一般健康问卷以及睡眠习惯和电子设备使用情况问卷。
共有 1382 名学生参与了这两项调查。调查 II 的 IAT 平均得分（36.0±15.2）明显高于调查 I（32.4±13.6）（P<0.001）。IAT 总分的增加表明，2018 年网络成瘾的发生率明显高于 2014 年。对于一般健康问卷的每个子量表，社会功能障碍评分在调查 II 中均明显低于调查 I（P=0.022）。在周末，调查 II 中的平均总睡眠时间为 504.8±110.1 分钟，醒来时间为 08:02 小时；与调查 I 相比，调查 II 中的总睡眠时间和醒来时间明显更长、更晚（P<0.001，P=0.004）。智能手机的使用在调查 II 中也明显高于调查 I（P<0.001）。
本研究 4 年间网络成瘾的流行情况有所不同。
