Prevalence and associated factors of computer vision syndrome among bank workers in Gondar City, northwest Ethiopia, 2015

Figures & data

Table 1 Sociodemographic characteristics of computer-using bank workers in Gondar city, 2015, n=304 (n=sample size)

Variables	Frequency (%)
Age, years
<25	93 (30.6)
25–30	141 (46.4)
>30	70 (23.0)
Sex
Female	106 (34.9)
Male	198 (65.1)
Marital status
Single	181 (59.5)
Married	120 (39.5)
Divorced	3 (1.0)
Educational status
Diploma	41 (13.5)
Degree	239 (78.6)
Masters and above	24 (7.9)

Table 2 Bivariate analysis for computer vision syndrome among bank workers in Gondar City, 2015, n=304 (n=sample size)

Variables	Computer vision syndrome		COR (95% CI)	p-value
	Yes	No
Sex
Male	151	47	1.58 (0.94, 2.67)	0.083
Female	71	35	1.00
Age, years
>30	54	16	1.24 (0.60, 2.55)	0.558
26–30	100	41	0.89 (0.50, 1.61)	0.339
≤25	68	25	1.00
Marital status
Married	91	29	1.27 (0.75, 2.14)	0.374
Unmarried	131	53	1.00
Educational level
Degree and above	193	70	1.14 (0.55, 2.36)	0.722
Diploma	29	12	1.00
Sitting position
Not appropriate	89	17	2.56 (1.41, 4.65)	0.002
Appropriate	133	65	1.00
Viewing distance, cm
≤50	66	14	2.05 (1.08, 3.91)	0.028
>50	156	68	1.00
Top of the computer screen
Below the level of eyes	54	18	1.29 (0.684, 2.42)	0.435
Above the level of eyes	56	16	1.50 (0.78, 2.87)	0.222
At the level of eyes	112	48	1.00
Duration of computer use, years
≥5	75	25	1.16 (0.67, 2.00)	0.587
<5	147	57	1.00
Time of computer use per day, hours
>6	170	56	1.52 (0.87, 2.66)	0.144
≤6	52	26	1.00
Taking break, minutes
>20	167	49	2.05 (1.20, 3.49)	0.009
≤20	55	33	1.00
Eye glass
Using eye glasses	31	4	3.17 (1.08, 9.27)	<0.001
Not using eye glasses	191	78	1.00
Frequent voluntary blinking
Yes	67	22	1.00	0.569
No	155	60	1.18 (0.67, 2.08)
Adjusting computer brightness
Yes	91	32	1.00	0.757
No	131	50	1.09 (0.65, 1.82)
Glare on the display
Yes	82	23	1.50 (0.86, 2.61)	0.149
No	140	59	1.00
Using antiglare
Yes	69	22	1.00	0.473
No	153	60	1.23 (0.70, 2.16)
Any systemic disease
Yes	18	5	1.36 (0.49, 3.79)	0.558
No	204	77	1.00

Abbreviations: CI, confidence interval; COR, crude odds ratio.

Table 3 Multivariate analysis for computer vision syndrome among bank workers in Gondar City, 2015, n=304 (n=sample size)

Variables	Computer vision syndrome			AOR (95% CI)	p-value
	Yes	No	COR (95% CI)
Sitting position
Not appropriate	89	17	2.56 (1.41, 4.65)	2.33 (1.27, 4.28)	0.006
Appropriate	133	65	1.00	1.00
Taking break, minutes
>20	167	49	2.05 (1.20, 3.49)	1.93 (1.11, 3.35)	0.020
≤20	55	33	1.00	1.00
Eye glass
Using eye glasses	31	4	3.17 (1.08, 9.27)	3.19 (1.07, 9.51)	0.038
Not using eye glasses	191	78		1.00

Abbreviations: AOR, adjusted odds ratio; CI, confidence interval; COR, crude odds ratio; n, sample size.

Figure S1 Prevalence of symptoms of computer vision syndrome among bank workers in Gondar city, 2015, n=304.

Figure S2 English version of questionnaire.