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Table 4 Analysis of differences in core self-evaluation of junior and senior high school students

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
Core self-evaluation score 34.52 ± 7.437 34.15 ± 7.053 1.042 0.298