Table 3. Predisposing factors for MRSA and MSSA keratitis.

Predisposing Factors	MRSA (n = 26)	MSSA (n = 33)		P value
Local factors, n (%)*
Conact lens wear	4 (15.4)	5 (15.2)		1†
Trauma	1 (3.8)	3 (9.1)		0.623†
Ocular surface disease	21 (80.8)	16 (48.5)		0.011
Previous ocular surgery	10 (38.5)	13 (39.4)		0.942
Usage of topical antibiotics or immunosuppressant	9 (34.6)	6 (18.2)		0.15
Systemic factors n (%)*
Systemic comorbidities	17 (65.4)	16 (48.5)		0.194
Immunosuppressant	1 (3.8)	2 (6.1)		1†
Systemic antibiotics	2 (7.7)	3 (9.1)		1†

^*: Total is greater than 100% because of some patients with multiple risk factors.

^†: P value obtained by Fisher's Exact Test.

MRSA: methicillin-resistant Staphylococcus aureus, MSSA: methicillin-sensitive Staphylococcus aureus.