MELODY-1 had two co-primary efficacy endpoints: one clinical symptom (pain) and one clinical sign (conjunctival lissamine green staining), as well as multiple other symptom and sign secondary endpoints of DED. Duration of treatment was 12 weeks with a 4-week run-in period. Analysis of the data indicated that both age and sex needed to be accounted for in the primary statistical analysis, (60% of the subjects were over age 60; 68% of the subjects were female). After adjusting the Intent-to-Treat (ITT) analysis for age and gender, PL9643 treatment demonstrated clinically meaningful (visual analog score reduction of >10 points from baseline) and statistically significant results for the co-primary symptom endpoint of pain (p
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