Paper Title
The Association Between Body Mass Index and Duration Spent on Smart Devices in Adult in Jeddah, Saudi Arabia

Abstract
Introduction: More than 1.9 billion adults worldwide are overweight. Previous studies have linked screen based sedentary behaviors, such as TV viewing and computer use with a decrease in the intake of fruits and vegetables. Aim: This study aims to investigate the association between obesity and duration spent on smart devices in Jeddah, Saudi Arabia. Methods: this cross sectional study investigates 350 participants, Jeddah residents,who are above18 years old. Four malls were used in the recruitment of those participants representing the geographical districts of Jeddah region. The data were obtained from self-reported questionnaire that investigates the time spent on smart devices and the nature of usage. These questions were derived from previous studies. In addition, body mass index (BMI) was calculated by measuring the participants� height and weight. Each participant completed the study consent before filling the questionnaire. Study analysis was conveyed using SPSS Version 21. Descriptive statistic was generated. Linear regression and T-Test were used. P value of 0.05 was used as a significant statistical level. Results: participants' mean usage time is 9.10 hours daily (SD=6.41). The mean of the number of smart devices owned by participants is 2.18 (SD=1.63). The participants BMI mean was 25.74 (SD=6.27). Using statistical tests, there were significant relation of BMI and time spent on smart devices (P=0.006). However, there was no significant relation between number of devices used and BMI. Conclusion: spending time on smart devices might be a factor to increase weight as it might promote for sedentary behaviors. Key words: Obesity, Bmi, Electronic Devices, Smart Devices, Adults, Jeddah.