Effect of Late Night Mobile Phone Use on Sleep

Background: Smartphones have become a prevalent technology and its use does not stop till late night. People take their mobile phones to bed with them and leave them switched on to make sure they do not miss any incoming calls, messages or other notifications which affects their sleep. Materials and Methods: Cross-sectional online survey of 6 months all over India involving 255 subjects of age 18-60 years. PQSI and PMPUS scales were applied along with other questions regarding late night mobile use. Results: As per PMPUS scale, 40 % participants experienced sleep problems due to excess mobile use. As per PQSI scale, most (70 %) late night mobile phone users reported decreased sleep duration, 50 % reported decreased sleep efficiency, 40 % reported increased sleep latency, 30 % reported sleep disturbances and day-time dysfunctions variables. Adjusted binary and multinomial logistic regression model showed late night mobile users were 1.59 times more likely to have poor sleep quality (PQSI score less than5) than non-users (pless than 0.001). Conclusion: Late night mobile phone use by individuals was associated with poorer sleep quality.