Table 1 Minimum events required to define R-URTI, categorized by observational period and age
From: Recurrent upper respiratory tract infections in early childhood: a newly defined clinical condition
N. of weeks of observation | < 1 years | 1–2 years | 3–5 years |
|---|---|---|---|
3–5 | 2 | 2 | 2 |
6 | 2 | 3 | 2 |
7 | 3 | 3 | 2 |
8–12 | 3 | 3 | 3 |
13–14 | 3 | 4 | 3 |
15–16 | 4 | 4 | 3 |
17–19 | 4 | 4 | 4 |
20–21 | 4 | 5 | 4 |