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Table 3 Hierarchical linear regression analyses results

From: Associations of personality traits with internet addiction in Chinese medical students: the mediating role of attention-deficit/hyperactivity disorder symptoms

Variables Step 1 (β) Step2 (β) Step3(β)
Gender −0.036 −0.073** − 0.061*
Age group −0.007 0.010 0.001
Hometown −0.062* −0.045 − 0.079**
Grade group 1 0. 094** 0.054 0.057
Grade group 2 0. 101* 0.038 0.060
Grade group 3 0. 144** 0.103* 0.096*
Extraversion   −0.001 −0.027
Agreeableness   −0.123** −0.082**
Conscientiousness   −0.318** −0.232**
Neuroticism   0.164** 0.096**
Openness   0.012 0.015
ADHD symptoms    0.319**
F 4.400** 36.536** 49.660**
R2 0.021 0.243 0.323
R2 0.021 0.222 0.080
  1. Grade group 1 = 2nd year/1st year, Grade group 2 = 3rd year/1st year, Grade group 3 = 4th year/1st year
  2. ** p < 0.01 (two-tailed), * p < 0.05 (two-tailed)