Table 2.

Summary of risk factors based on different age groups.

	Age ≤ 50 years	Age > 50 years	P-value
	Total N = 118	Total N = 165
	N (%)	N (%)
Presence of risk factors			0.66
None	4 (3.4)	6 (3.6)
One	78 (66.1)	111 (67.3)
Two	26 (22.0)	40 (24.2)
Three or more	10 (8.5)	8 (4.8)
Type of risk factors			<0.001
OSD*	54 (45.8)	80 (50.6)	0.65
Contact lens wear	68 (57.6)	32 (19.4)	<0.001
Immunosuppression**	9 (7.6)	43 (26.1)	<0.001
Prior corneal surgery	15 (12.7)	24 (14.5)	0.19
Topical corticosteroids	8 (6.8)	23 (14.6)	0.06
Trauma	10 (8.5)	15 (9.1)	0.86

OSD, Ocular surface disease.

^*Includes dry eye disease, meibomian gland disease, neurotrophic keratopathy, exposure keratopathy, previous corneal infection, corneal erosion syndrome, limbal stem cell deficiency, cicatricial conjunctivitis, band keratopathy, and bullous keratopathy.

^**Includes diabetes, use of systemic immunosuppressive drugs, malnutrition, and immunodeficiency. Significant values are in bold.