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Table 1 Demographic and clinical characteristics of study participants

From: Viral etiology and epidemiology of pediatric patients hospitalized for acute respiratory tract infections in Macao: a retrospective study from 2014 to 2017

Parameter Patients with ARIs (n = 4880) Viral infection
Yes
(n = 3767)
No
(=1113)
Counts % Counts % Counts %
Gender
 Male 2707 55.5% 2120 56.3% 587 52.7%
 Female 2173 44.5% 1647 43.7% 526 47.3%
Age group (years)
 0- < 1 (infant) 857 17.6% 673 17.9% 184 16.5%
 1- < 3 (toddler) 2407 49.3% 1962 52.1% 445 40.0%
 3- < 6 (preschool child) 1222 25.0% 908 24.1% 314 28.2%
  ≥ 6 (school child) 394 8.1% 224 5.9% 170 15.3%
Season of admission
 Spring 1406 28.8% 1095 29.1% 311 27.9%
 Summer 1306 26.8% 944 25.1% 362 32.5%
 Autumn 1176 24.1% 960 25.5% 216 19.4%
 Winter 992 20.3% 768 20.4% 224 20.1%
Clinical diagnosis
 Upper respiratory tract infection 2383 48.8% 1720 45.7% 663 59.6%
 Croup 141 2.9% 123 3.3% 18 1.6%
 Lower respiratory tract infection 2356 48.3% 1924 51.1% 432 38.8%