Table 6

Correlation between daily hours on different electronic devices with Ocular Surface Disease Index (OSDI), tear break-up time (TBUT) and corneal fluorescein staining scores (CFSS)

Average daily hours on different electronic devices	OSDI		TBUT		CFSS
Average daily hours on different electronic devices	r	P value	r	P value	r	P value
Television (hour/day)	0.003	0.881	0.050	0.010	−0.009	0.630
Smartphone (hour/day)	0.082	<0.001	0.016	0.400	0.015	0.425
Tablet (hour/day)	0.064	0.001	−0.001	0.948	0.034	0.077
Computer (hour/day)	0.030	0.122	0.011	0.561	0.010	0.621

r, correlation coefficient.