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Table 1 Background characteristics of the participants (N = 195)

From: A longitudinal study of changes in smart phone addiction and depressive symptoms and potential risk factors among Chinese college students

  n %
Sex
 Female 114 58.5%
 Male 81 41.5%
Residence
 Urban 102 52.3%
 Rural 93 47.7%
One-child familya
 Yes 94 48.2%
 No 100 51.3%
Hours of smart phone use per day
 > 0–4 81 41.6%
 > 4–8 104 53.3%
 > 8 10 5.1%
Major
 Anesthesia 27 13.8%
 Forensic Medicine 29 14.9%
 Stomatology 54 27.7%
 Chinese Medicine 85 43.6%
  1. a1(0.5%) missing value