[Status of 'internet addiction disorder' (IAD) and its risk factors among first-grade junior students in Wuhan].

Objective: To understand the epidemiological characteristics and influential factors on internet addiction disorder (IAD) among first-grade junior students in Wuhan city.

Methods: An anonymous questionnaire survey was carried out on 1219 first-grade junior students through stratified cluster sampling in 4 middle schools in Wuhan city.

Results: The internet use rate (IUR) of first-grade junior students was 96.