TABLE 2.

Demographics and baseline characteristics of RSV+ children in five Italian regions. Variables with a * have a statistically significant difference among regions.

Patient characteristics	Number of subjects enrolled Lazio: 122	Number of subjects enrolled Liguria: 203	Number of subjects enrolled Lombardy: 164	Number of subjects enrolled Apulia: 65	Number of subjects enrolled Tuscany: 96
	Number of RSV+ Lazio: 70 (57.3%)	Number of RSV+ Liguria: 59 (29.1%)	Number of RSV+ Lombardy: 55 (33.5%)	Number of RSV+ Apulia: 38 (58%)	Number of RSV+ Tuscany: 24 (25%)
Age in months (median, IQR) (mean, SD)	12 (6.25–21.75)	13 (8–29)	14 (7.5–21)	12 (5–23.5)	9.5 (5.75–17.25)
	16.57 ± 13.64	18.74 ± 15.41	18.02 ± 11.92	16.24 ± 14.68	12 ± 8.95
Age groups (n, %)
0–5 months	16 (23.2%)	9 (15.3%)	8 (15.1%)	13 (34.2%)	6 (25%)
6–11 months	17 (23.2%)	16 (27.1%)	14 (26.4%)	6 (15.8%)	8 (33.3%)
0–11 months	33 (46.3%)	25 (42.4%)	22 (41.5%)	19 (50%)	14 (58.3%)
12–23 months	21 (30.4%)	16 (27.1%)	22 (39.6%)	9 (23.7%)	6 (25%)
24–59 months	16 (23.2%)	18 (30.5%)	11 (18.9%)	10 (26.3%)	4 (16.7%)
Birth weight (median, IQR) (mean, SD)	3260 (3000–3447.5)	3230 (2900–3570)	3385 (3045–3562.5)	3262,5 (2925–3550)	3448 (3007.5–3600)
	3266 ± 437	3127 ± 890	3354 ± 628	3242 ± 571	3295 ± 603
Boys (n, %)	39 (55.7%)	27 (45.7%)	27 (49.1%)	18 (47.4%)	14 (58.3%)
Prematurity (n, %)	3 (4.3%)	7 (11.9%)	0	2 (5.3%)	2 (8.3%)
Presence of chronic condition (n, %)
Respiratory disease	6 (8.6%)	2 (3.4%)	0	1 (2.6%)	0
Congenital heart disease	1 (1.4%)	3 (5%)	0	0	0
Immunocompromised	0	1 (1.7%)	0	0	0
Atopy*	6 (8.6%)	4 (6.8%)	0	11 (28.9%)	5 (20.8%)
Vaccination status (n, %)
Influenza vaccination this season (n, %)	16 (22.8%)	17 (28.8%)	5 (9.1%)	8 (21.1%)	2 (8.3%)
RSV subtype
RSV‐A*	9 (12.8%)	8 (13.5%)	31 (56.4%)	4 (10.5%)	7 (29.2%)
RSV‐B*	37 (52.9%)	49 (83.1%)	24 (43.6%)	34 (89.5%)	17 (70.8%)
RSV‐A + RSV‐B	0	2 (3.4%)	0	0
Not available	24 (34.3%)	0	0	0