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Table 1 Sample characteristics of problematic Internet use (PIU), n (%)

From: Problematic Internet use in Chinese adolescents and its relation to psychosomatic symptoms and life satisfaction

Variables Total PIU χ 2 P
Gender     
Male 7 734(49.8) 804(10.4) 106.67 <0.001
Female 7 804(50.2) 458(5.9)   
Grade     
Junior High school 4 758(30.6) 395(8.3) 16.54 <0.001
Senior High school 5 719(36.8) 517(9.0)   
College 5 061(32.6) 350(6.9)   
Residential background     
Rural 6 297(40.5) 415(6.6) 33.28 <0.001
Urban 9 241(59.5) 847(9.2)   
Area     
Eastern area 5 866(37.8) 570(9.7) 84.56 <0.001
Middle area 5 254(33.8) 279(5.3)   
Western area 4 418(28.4) 413(9.3)   
Self-report family economy     
Lower 2 746(17.7) 237(8.6) 19.16 <0.001
Middle 10 250(66.0) 769(7.5)   
Upper 2 542(16.4) 256(10.1)   
Service type mostly used     
Information searching 2 291(14.7) 42(1.8) 361.52 <0.001
Entertainment 7 279(46.8) 764(10.5)   
Chatting 3 165(20.4) 145(4.6)   
Relieving loneliness 1 652(10.6) 254(15.4)   
Others 1 151(7.4) 57(5.0)   
Frequency of Internet use     
≤ 4 times/week 13 056(84.0) 770(5.9) 541.92 <0.001
≥ 5 times/week 2 482(16.0) 492(19.8)