title: Evaluation of mobile phone addiction level and sleep quality in university students.
abstract: OBJECTIVE
  To determine the mobile phone addiction level in university students, to examine several associated factors and to evaluate the relation between the addiction level and sleep quality.
  
  
  METHODS
  The study is a cross-sectional research conducted on the students of the Sakarya University between 01 November 2012 and 01 February 2013. The study group included 576 students. The Problematic Mobile Phone Use Scale was used for evaluating the mobile phone addiction level and the Pittsburgh Sleep Quality Index for assessing the sleep quality. Mann-Whitney U test, Kruskal-Wallis test and Spearman's Correlation Analysis were used for analyzing the data.
  
  
  RESULTS
  The study group consisted of 296 (51.4%) females and 208 (48.6%) males. The mean age was 20.83 ± 1.90 years (min:17, max:28). The addiction level was determined to be higher in the second-year students, those with poor family income, those with type A personality, those whose age for first mobile phone is 13 and below and those whose duration of daily mobile phone use is above 5 hours (p < 0.05 for each). The sleep quality worsens with increasing mobile phone addiction level (p < 0.05).
  
  
  CONCLUSIONS
  The sleep quality worsens with increasing addiction level. It was concluded that referring the students with suspected addiction to advanced healthcare facilities, performing occasional scans for early diagnosis and informing the students about controlled mobile phone use would be useful.
authors.affiliation: Sevil Sahin, Sakarya University, School of Health Sciences, Sakarya, Turkey.
authors.forename: Sevil
authors.initials: S
authors.lastname: Sahin
authors.affiliation: Kevser Ozdemir, Sakarya University, School of Health Sciences, Sakarya, Turkey.
authors.forename: Kevser
authors.initials: K
authors.lastname: Ozdemir
authors.affiliation: Alaattin Unsal, Public Health Department, Osmangazi University, Eskisehir, Turkey.
authors.forename: Alaattin
authors.initials: A
authors.lastname: Unsal
authors.affiliation: Nazen Temiz, Sakarya University, School of Health Sciences, Sakarya, Turkey.
authors.forename: Nazen
authors.initials: N
authors.lastname: Temiz
keywords: Mobile phone addiction; Sleep quality; University students