Table 3.

Univariable and multivariable analyses of viral prevalence in relation to explanatory variables

	EV						HHV6B
	Univariable			Multivariable			Univariable
	OR	95% CI	P value	OR	95% CI	P value	OR	95% CI	P value
Age group II vs age group I	0.16	0.06‐0.40		0.20	0.07‐0.52		0.70	0.27‐1.89
Age group III vs age group I	0.27	0.10‐0.73	<.001	0.30	0.11‐0.81	.003 a	0.48	0.15‐1.53	.47
Sex (male vs female)	1.86	0.86‐4.07	.12				1.25	0.56‐2.78	.58
Allergic rhinitis	0.57	0.23‐1.27	.18				0.45	0.17‐1.07	.085
Asthma	0.98	0.27‐2.85	.97				0.76	0.17‐2.43	.68
Atopic dermatitis	1.46	0.53‐3.62	.43				1.01	0.32‐2.71	.99
Current smoker	0.20	0.03‐0.71	.034	0.33	0.05‐1.24	.15 b	1.49	0.57‐3.57	.39
Any respiratory symptoms	1.44	0.67‐3.19	.35				0.60	0.26‐1.34	.22
Sore throat	1.48	0.65‐3.26	.34				0.85	0.33‐2.00	.72
Other respiratory symptoms	1.22	0.56‐2.64	.61				0.64	0.26‐1.45	.30
Tonsillar hypertrophy	2.53	1.13‐5.62	.022	0.82	0.22‐2.62	.75 c	1.26	0.51–2.92	.60
Chronic tonsillitis	0.94	0.44‐2.06	.88	1.79	0.71‐4.90	.24 c	0.39	0.17–0.87	.023 d
Recurrent tonsillitis	0.93	0.42‐2.02	.86	1.57	0.66‐3.79	.31 c	1.60	0.72–3.58	.25
History of peritonsillar abscess	0.46	0.07‐1.69	.31	0.82	0.12‐3.30	.80 c	1.77	0.54–5.03	.31

Abbreviations: CI, confidence interval; EV, enterovirus; HHV6B, human herpesvirus 6B; OR, odds ratio.

^aAdjusted for smoking.

^bAdjusted for age group.

^cAdjusted for age group and smoking.

^dThe prevalence of HHV6B was inversely related to the presence of chronic tonsillitis when adjusted for age group (OR = 0.41, 95% CI, 0.17‐0.97, P = .044).