Figure 1.

The flowchart of the number of cases included in the study.

Twelve patients whose age was unknown were excluded in this analysis.

Details of “Non-fixed” cases (n=1,943: 5.5%) were as follows:

Inclusion criteria, 446 (1.3%); demographics and epidemiological characteristics,740 (2.1%); comorbidities, 710 (2.0%); signs and symptoms, 1,049 (3.0%); outcome at discharge,1,416 (4.0%); supportive care, 1,368 (3.9%); history of drug administration, 1,315 (3.7%); complication during hospitalisation, 1,390 (3.9%)