Table 5. Univariable and multivariable logistic regression analysis of factors associated with relapse of URI.

Univariable models	OR	95% CI	p-value
Number of drugs (n = 118)
1 to 4 (n = 61)	1.00
5 to 8 (n = 38)	1.25	0.50–3.10	0.63
9 or more (n = 19)	8.59	2.65–27.82	<0.001
Steroids (n = 133)	3.10	1.44–6.68	0.004
Antihistamine (n = 133)	2.55	1.19–5.49	0.016
Chlorpheniramine (n = 113)	4.32	1.94–9.61	<0.001
Enrofloxacin (n = 113)	2.31	0.96–5.56	0.063
Cefovecin (n = 113)	2.65	1.00–6.97	0.049
Prednisone (n = 133)	2.76	1.11–6.83	0.028
Vitamins/Fluids (n = 113)	7.71	1.49–40.05	0.015
Multivariable model (n = 133)
Steroids	3.16	1.44–6.95	0.004
Antihistamine	2.61	1.18–5.79	0.018