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Table 1 The mobile phone dependence status of high school students (±s)

From: Core self-evaluation, mental health and mobile phone dependence in Chinese high school students: why should we care

  Students in grades 7–9 (n = 832) Students in grades 10–12(n = 805) t P
Withdrawal symptoms 10.28 ± 4.971 10.31 ± 4.092 −0.109 0.913
Craving behavior 5.02 ± 2.177 5.03 ± 1.958 −0.123 0.902
Physical and mental influence 7.38 ± 3.533 8.41 ± 3.379 −6.02 0.000**
Total score 22.68 ± 9.574 23.75 ± 8.203 −2.415 0.016*
  1. *P < 0.05, **P < 0.01