Table 1.

Demographic and clinical characteristics of the study cohort

Characteristic	FS Group (n = 102)	Control Group (n = 237)	Statistical Test	P-value
Age, years			Kruskal-Wallis	< 0.001
< 1	42 (41.2%)	60 (25.3%)
1–4	39 (38.2%)	93 (39.2%)
5–10	11 (10.8%)	44 (18.6%)
> 10	10 (9.8%)	40 (16.9%)
Male sex	64 (62.7%)	150 (63.3%)	χ²=0.07	0.739
Vaccination Status			χ²=28.4	< 0.001
Unvaccinated	91 (89.2%)	163 (68.8%)
Partial	5 (4.9%)	25 (10.5%)
Full	6 (5.9%)	49 (20.7%)
Comorbidities	85 (83.3%)	198 (83.4%)	χ²=0.03	0.857
Hospital stay, days	5 [3–7]	3 [2–5]	Mann-Whitney U = 7842	0.002
(median [IQR])

Data are presented as n (%) or median [IQR]. Significant P-values (<0.05) are in bold. ORs are adjusted in Table 2