Participants recorded the severity of their nasal symptoms (sneezing, runny nose, itchy nose and nasal congestion) in the past 10 minutes (prior to the assessment) daily using the following scale:
0=absent (no sign/symptom); 1=mild (sign/symptom present, easily tolerated); 2=moderate (bothersome but tolerable); 3=severe (hard to tolerate, interfere with daily activities).
The total nasal symptom score (sum of 4 symptom scores) ranges from 0 to 12 (worst symptoms). A negative change from baseline score indicates improvement.