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Results of the intention-to-treat (ITT) group in percentages, ranges or means ± SDs or SEs. Total symptom score includes total nasal symptom score (runny nose, sneezing, itchy nose, and nasal congestion) and total ocular symptom score (watery eyes and itchy eyes). Total symptom score = total of 6 individual symptom scores, each assessed on a 5-point scale (from 0 = absent to 4 = very severe). Symptom-medication score = average total symptom score (total symptom score/6) plus medication score. Statistical analysis was performed using unpaired t-test or Fisher’s exact probability test. M, male; F, female.