Table 1.

Description of the major outcomes of the study.

The Outcome	Acronym	Method of Calculation	Assessed at Weeks
Frequency of days with URTI symptoms	FSD	Number of days with any URTI symptoms/days of analyzed period	4, 8, 12, 14, 16, 18, 20, 21
Average gravity score of URTI symptoms	AGS	Total URTI score/days of analyzed period	4, 8, 12, 14, 16, 18, 20, 21
Number of URTI episodes	NUE	Sequence of days with URTI score 2 lasting for at least 3 days with at least 3 days separation from other episodes	21