Table 4: OSDI category at baseline and 3 months after starting treatment with BAK-preserved travoprost 0.004% in newly diagnosed POAG patients included in the study.

OSDI categoryBaselineAfter 3 months

Normal*12 (30%)2 (5%)<0.001
Mild*4 (10%)2 (5%)0.157
Moderate*11 (28%)12 (30%)0.773
Severe*13 (32%)24 (60%)0.025

(percentage).
POAG: primary open-angle glaucoma; OSDI: ocular surface disease index.