Table 6.

Factors associated with RSV hospitalization compared to influenza hospitalization unadjusted and adjusted logistic regression models.

	RSV compared to Influenza
	Unadjusted OR (95% CI)a	Pc	Adjusted OR (95% CI)a,b	Pc
BMI
Underweight/normal (18.5-24.99)	Ref		Ref
Overweight (25-29.99)	1.15 (0.55-2.40)	.80	1.01 (0.47-2.18)	.66
Obese (≥ 30)	1.56 (0.85-2.91)	.15	1.38 (0.73-2.66)	.25
Charlson score
0	Ref		Ref
1	1.24 (0.47-3.57)	.18	0.84 (0.30-2.54)	.11
2	2.47 (0.93-7.26)	.17	1.76 (0.63-5.36)	.26
≥3	2.92 (1.25-7.83)	.01	1.87 (0.76-5.20)	.08
Age group
18-49	Ref		Ref
50-64	2.46 (1.29-4.83)	.01	1.87 (0.93-3.84)	.05
≥65	1.54 (0.79-3.10)	.96	1.16 (0.56-2.45)	.57
Hospital B	1.24 (0.76-2.05)	.39	1.25 (0.73-2.14)	.42
Year (2015-2016)	0.55 (0.32-0.93)	.03	0.57 (0.32-0.99)	.05
Time to admission, days	1.16 (1.04-1.31)	.01	1.16 (1.03-1.30)	.02

Abbreviations: BMI, body mass index

^aFirth penalized logistic regression models with profile-likelihood confidence intervals.

^bAdjusted for BMI, Charlson score, age, study site, year, and time from illness onset to admission.

^cWald p-values.