Table 4.

Multiple logistic regression model for factors associated with RSV severity

Variable	Adjusted OR (95% CI)	P value
Age, months	df = 2	0.1
0–5	0.56 (0.33–0.96)	0.04
6–11	0.68 (0.38–1.23)	0.2
12–23	Reference
Sex
Male	1.43 (1.07–1.91)	0.02
Female	Reference
History of stay in neonatal intensive care at birth
Yes	1.23 (0.60–2.53)	0.5
No	Reference
Chest X-ray-pneumonia (yes vs. no)a
Yes	1.89 (1.41–2.55)	<0.001
No	Reference
Chronic medical conditions
Yes	1.12 (0.67–1.86)	0.7
No	Reference
Treatment with inhalations during hospitalisation
Yes	1.06 (0.67–1.68)	0.8
No	Reference
Treatment with inhalations before hospitalisation
Yes	1.49 (1.09–2.03)	0.01
No	Reference
Oxygen therapy during hospitalisation
Yes	2.78 (1.94–3.97)	<0.001
No	Reference
Steroid therapy during hospitalisation
Yes	2.46 (1.51–3.99)	<0.001
No	Reference
Vapotherm therapy during hospitalisation
Yes	1.65 (0.68–3.98)	0.3
No	Reference

CI, confidence interval; df, degrees of freedom; OR, odds ratio; RSV, respiratory syncytial virus; SES, socio-economic status.

Nagelkerke R² = 0.179.

^aNo pneumonia by chest X-ray or by clinical judgment (i.e. chest X-ray was not ordered).