The association between mobile phone or tablet use and children’s health remains unclear. The main aim of this study was to examine whether caregiver-rated health and children’s mental disorders were related to their mobile phone use. We conducted a multistage sampling Internet survey of 1535 caregivers living with children aged 0–14 years in Japan. Using this cross-sectional data, multiple regression models were used to test for relationships among factors related to mobile phone use, caregiver-rated child health, and mental disorders. Total mobile phone use time was related to age, number of siblings, availability of Wi-Fi at home, and the child’s ownership of a mobile phone. Age and availability of Wi-Fi at home were positively related to tablet use, but neither the number of siblings nor the child’s ownership of a tablet were related to tablet use. In addition, we examined that tablet use (Odds ratio 0.62, 95% CI 0.39–1.00) and Wi-Fi use (Odds ratio 0.66, 95% CI 0.47–0.93) were related to low caregiver-rated child health among preschool students. It was newly pointed out that tablet and Wi-Fi use were related to low caregiver-rated child health among preschool students. As young children are likely to be exposed to internet for the purpose of babysitting, this study suggested that parents should be aware of mental influence for tablets and Wi-Fi use.

手机或平板电脑的使用与儿童健康之间的关联尚不清楚。这项研究的主要目的是检查看护者评定的健康状况和儿童精神障碍是否与手机使用有关。我们对1535名日本0-14岁儿童的护理人员进行了多阶段互联网抽样调查。使用此横截面数据，使用多个回归模型来测试与手机使用，护理人员评估的儿童健康和精神障碍相关的因素之间的关系。手机的总使用时间与年龄，同胞数量，家庭中的Wi-Fi可用性以及孩子对手机的拥有量有关。家庭使用Wi-Fi的年龄和可用性与平板电脑的使用呈正相关，但是兄弟姐妹的数量和孩子对平板电脑的所有权都与平板电脑的使用无关。此外，我们检查了平板电脑的使用（几率0.62，95％CI 0.39-1.00）和Wi-Fi的使用（几率0.66，95％CI 0.47-0.93）与学龄前儿童看护者评价的儿童健康水平低有关。最近指出，平板电脑和Wi-Fi的使用与学龄前儿童看护者评价的儿童健康水平低有关。由于幼儿可能会为了保姆目的而接触互联网，因此本研究建议父母应注意使用平板电脑和使用Wi-Fi的心理影响。最近指出，平板电脑和Wi-Fi的使用与学龄前儿童看护者评价的儿童健康水平低有关。由于幼儿可能会为了保姆目的而接触互联网，因此本研究建议父母应注意使用平板电脑和使用Wi-Fi的心理影响。最近指出，平板电脑和Wi-Fi的使用与学龄前儿童看护者评价的儿童健康水平低有关。由于幼儿可能会为了保姆目的而接触互联网，因此本研究建议父母应注意使用平板电脑和使用Wi-Fi的心理影响。