Tab. I.

The information on the demographic and methodologies of selected studies from 2010 to 2020.

Research	Amina et al.	Parash et al.	Amer et al.	Ashwini et al.	Amit et al.	Arif et al.	Syeda et al.
Year	2018	2017	2019	2019	2016	2015	2019
Country	Pakistan	Nepal	India	India	India	Pakistan	Bangladesh
Sample	1AB	1A	1A	1B	1B	2B	2A
Insomnia scale	PSQI	PSQI	PSQI	PSQI	PSQI	PQSI, ESS	PQSI
Cut-off	> 5	> 5	> 5	> 5	> 5	> 5, > 10	> 5
Sample size	520	937	617	463	308	504	390
Response rate	85.8%	92%	95.07%	92.6%	96.25%	77.5%	75%
Sex male (%)	37.1	45.4	51	38.2	57.14	40.5	40.3
Mean age(± ± ± SD)	20.25 (1.5)	21.01 (2.18)	23.4 (3.6)	19.55 (1.04)	21.4 (1.85)	20 (1.4)	NR
Total Prevalence(%)	59.04	35.4	51	70	39.6	39.5	69.5
Covariates measured	Sleep quality was higher among non-medical students than in medical students	Depression, internet addiction	Physical activity, depression, anxiety	Computer vision syndrome, headache, light sensitivity, double vision	Analgesic self-medication, headache	Poor sleep quality was higher among females	Association of social status and internet use with sleep quality was measured

PSQI = Pittsburgh Sleep Quality Index; ESS = Epworth Sleepiness Scale; SD = Standard Deviation; 1 = random sampling; 2 = convenience sampling; A = university sample; B = medical sample; NR = Not Reported.