Abstract
"Smartphones are essential in university students’ lives. However, its frequent use can lead to addiction and affect their academic performances negatively and well-being. There is little or no research on the pattern, perceived adverse effects and factors that promote smartphone addiction. This study was designed to investigate smartphone use patterns, the predictive factors of addiction, addiction characteristics and perceived health effects among university students. A cross-sectional survey design and a multi-stage sampling technique were used to select 250 students from the University in Ibadan. A modified Scale and Smartphone Addiction Scale-Short Version (SAS-SV) were used for data collection. Data were analysed and presented in descriptive and inferential statistics at ? 0.05. Respondents' age was 26.9±2.4 years, 52.8% were males, and 81.2% were single. Smartphone addiction prevalence was 61.2%. The majority (73.6%) had a negative attitude towards smartphone use. Most (83.6%) perceived smartphone addiction affects sleep quality, and 76.8% perceived smartphone addiction negatively affects academic performance. Respondents have high-perceived health effects towards smartphone addiction, but this did not influence their attitude towards smartphone use. " Keywords: Smartphone use, smartphone addiction, university students, perceived health effects

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