TABLE 4.

Change in the Interferometric Pattern of the Tear Film for the Azithromycin (AZM) and Control Groups Between Before and After Treatment

	AZM	Control	P
Interferometric pattern
Effective	10 (77%)	2 (13%)	0.002a
Ineffective	3 (23%)	13 (87%)

Eyes of interferometric class 2 (evaporative dry eye type) or class 1 (aqueous-deficient dry eye type) at baseline were categorized as showing an improvement (i.e., treatment was effective) if the interferometric pattern changed to class 0 (normal type).

The P value was determined with the Fisher exact test.

^aP<0.05.