Table 2 Participant demographic and clinical data.

From: Neutralizing antibodies to SARS-CoV-2 variants of concern: a pediatric surveillance study

Variable

N = 619

Male sex, n (%)

344 (56)

Age (yrs), median (IQR)

7 (6–9)

Age group, n (%)

5 years old

112 (18)

6 years old

97 (16)

7 years old

108 (17)

8 years old

97 (16)

9 years old

90 (15)

10 years old

105 (17)

11 years old

≤ 10 (≤ 1)

12 years old

≤ 5 (≤ 1)

Medical service, n (%)

Emergency

232 (37)

Specialty service

174 (28)

Haematology/Oncology

108 (17)

Medicine

87 (14)

Surgery

18 (3)

Comorbidities, n (%)

Asthma

117 (19)

Diabetes

13 (2)

Possible Immuno-compromised, n (%)

Leukopenia1

86 (14)

Neutropenia1

35 (6)

Lymphopenia1

165 (28)

Active Immunotherapy

81 (13)

Steroid Medication

38 (6)

COVID-19 vaccine doses before sample collection, n (%)

0 doses

335 (54)

1 dose

169 (27)

2 doses

115 (19)

Days between 1st and 2nd dose, median (IQR)

56 (50–56)

  1. Note: ≤ used to maintain subject privacy. 1Variable % calculated excluding those with missing data. Leukopenia, neutropenia, and lymphopenia were defined as cell counts falling below the normal range established by the hospital laboratory standards.