Study type: Epidemiological study (observational study)

Mobile usage and sleep patterns among medical students. epidem.

Published in: Indian J Physiol Pharmacol 2014; 58 (1): 100-103

Aim of study (acc. to author)

A survey was conducted in India to investigate the association between mobile phone use and sleep pattern and quality of medical students.

Further details

The volunteers fulfilling the inclusion criteria of more than one year of GSM mobile phone use were included in the study. Study participants were questioned about their sleep quality/pattern using a Pittsburgh Sleep Quality Index questionnaire.

Endpoint/type of risk estimation

Type of risk estimation:



Exposure groups

Group Description
Group 1 mobile phone use ≤ 2 hours/day
Group 2 mobile phone use > 2 hours/day


Study size

Type Value
Total 100
Statistical analysis method:

Conclusion (acc. to author)

Overall 57% of the medical students were using the mobile phones for more than 2 hours per day.
Sleep disturbance, sleep latency and day dysfunction was higher among students using their mobile phone more than 2 hours/day, especially among females. A significant difference in sleep disturbance was observed among students using their mobile phone more than 2 hours/day compared to students with less than 2 hours/day use. Evening usage of mobile phone in students using their mobile phone more than 2 hours/day showed a statistically significant negative correlation with sleep quality.
The authors conclude that students using mobile for > 2 hours/day may cause sleep deprivation and day sleepiness affecting cognitive and learning abilities of medical students.

Study funded by

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