. Author manuscript; available in PMC: 2016 Aug 1.

Published in final edited form as: Ophthalmology. 2014 Jan 28;121(6):1269–1273. doi: 10.1016/j.ophtha.2013.12.006

Table 1.

Characteristics of the study cohorts

	Fluoroquinolone	Macrolide	β-Lactam	p-value
Total patients (N)	38,046	48,074	69,079
Total prescriptions (N)	92,130	107,086	178,352
Female (%)	61.0%	61.4%	56.8%	<0.001
Mean patient age (years +/− std dev)	50.6 +/− 19.6	43.1 +/− 17.7	42.8 +/− 18.6	<0.001^a
Caucasian (%)	88.6%	86.7%	86.2%	<0.001

Analysis of variance (ANOVA) p-value