Table 4. Lifestyle-related factors associated with DED according to OSDI score.

DED: dry eye disease; OSDI: Ocular Surface Disease Index; **means P < .01; * means .01 < P < .05

Variable	Category	Normal (0-12 points) N (%)	Symptomatic DED (≥13 points) N (%)	p
Time spent using the mobile	0-1h	13 (27.1)	35 (72.9)	0.024*
	1-2h	23 (37.7)	38 (62.3)
	2-3h	16 (21.9)	57 (78.1)
	4h and more	27 (18.2)	121 (81.8)
Time spent using electronic devices	0-1h	45 (29.8)	106 (70.2)	0.137
	1-2h	13 (21.3)	48 (78.7)
	2-3h	10 (18.2)	45 (81.8)
	4h and more	11 (17.5)	52 (82.5)
Time spent watching TV	0-1h	31 (22.3)	108 (77.7)	0.007**
	1-2h	12 (15.2)	67 (84.8)
	2-3h	25 (39.7)	38 (60.3)
	4h and more	11 (22.4)	38 (77.6)
Time spent on reading	0-1h	52 (26.9)	141 (73.1)	0.260
	1-2h	12 (15.8)	64 (84.2)
	2-3h	7 (21.9)	25 (78.1)
	4h and more	8 (27.6)	21 (72.4)
Time doing outdoor activities	0-1h	27 (22.5)	93 (77.5)	0.336
	1-2h	16 (20.8)	61 (79.2)
	2-3h	19 (22.9)	64 (77.1)
	4h and more	17 (34.0)	33 (66.0)
Sleep time	1-5h	8 (17.0)	39 (83.0)	0.331
	6-8h	45 (26.9)	122 (73.1)
	8h and more	26 (22.4)	90 (77.6)