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Table 4 Comparison of acute respiratory tract infections in children in prepandemic and Covid-19 pandemic winter months

From: Incidence of acute respiratory infections in preschool children in an outpatient setting before and during Covid-19 pandemic in Lombardy Region, Italy

  ARTIs URTIs LRTIs
Age group November 2019 to February 2020
(prepandemic winter months)
November 2020 to February 2021
pandemic winter months)
November 2019 to February 2020
(prepandemic winter months)
November 2020 to February 2021
pandemic winter months)
November 2019 to February 2020
(prepandemic winter months)
November 2020 to February 2021
pandemic winter months)
0 ys 36,5 23,7 12,8
1 ys 41,2 8,2 28,5 6,5 12,7 1,7
2 ys 37,0 7,2 19,5 6,1 17,6 1,1
3 ys 37,1 3,6 22,4 2,8 14,7 0,7
4 ys 21,7 4,8 15,1 4,0 6,6 0,8
5 ys 26,9 5,9 17,4 5,0 9,5 0,8
All a 35,0 6,3 22,3 5,2 12,8
All ages relative reduction (95°CIs) −82.1%
(77,8–85,7)
−76,8%
(−70,2-81,9)
−91,3%
(86,1-95,0)
  1. ARTIs acute respiratory tract infections, LRTIs lower respiratory tract infections, URTIs upper respiratory tract infections, CIs confidence intervals, Ys years a: all children