Table 1 Characteristics of the study population

Number

288

617

Median age (range)

6y (2 m–18y)

3y (1 m–18y)

p < 0.001

% Females

48

45

p = 0.8

Median length of hospital stay (range, days)

4 (1–31)

3 (1–37)

p < 0.001

Median interval from drug/vaccine to symptom onset (range, days)

2 (0–60)

0 (0–90)

p < 0.001

Children exposed to drugs: N (%)

175 (61)

435 (71)

p < 0.08

Children exposed to vaccines: N (%)

21 (7)

68 (11)

p = 0.08