Table 1.

Demographic profile of consecutive patients in the corneal clinic of The Second Xiangya Hospital (n=100)

Characteristic	Number of patients	P-value
Sex		1.000
Male	50
Female	50
Age (years) mean ± SD		0.276a
Average age	46.0±20.1
Male	43.8±19.8
Female	48.2±20.3
Location		0.194
Rural	57
Urban	43
Occupation		0.165
Indoor work	24
Nonagricultural work	16
Agricultural work	28
Children and students	15
Unemployed	17
Laterality of eye affected		0.756
Right eye	30
Left eye	36
Both eyes	34
Etiology		0.151
Noninfectious	55
Infectious	40
Both	5
Visual impairment		<0.001
Mild or no impairment	48
Moderate	12
Severe	10
Blindness	30

Notes:

^aThe Student’s t-test was used to compare age difference between males and females. The one-sample chi-square test was used in all other comparisons.

Abbreviation: SD, standard deviation.