Table 3.

Logistic regression model explaining the self-reported history of smoking and heavy alcohol use^* with patient demographics, tumor size, and lymph node metastasis among patients with oral squamous cell carcinoma sites, Helsinki University Hospital, Finland, January 2016 – December 2020 (N=519)

Univariate logistic regression analysis				Multivariate logistic regression analysis**
Variable	OR	95% CI	p	Variable	AOR	95% CI	p
Age (years)	0.95	0.94–0.97	<0.001	Age (years)	0.95	0.94–0.97	<0.001
Sex (Ref. male)	0.33	0.23–0.48	<0.001	T-classification (Ref. T1-T2)	1.73	1.15–2.60	0.009
T-classification (Ref. T1-T2)	1.25	0.87–1.80	0.230	Floor of the mouth (Ref. no)	26.15	8.01–84.84	<0.001
Lymph node metastasis (Ref. no)	2.15	1.44–3.21	<0.001
Floor of the mouth (Ref. no)	25.78	8.02–82.95	<0.001

^*Either or both. AOR: adjusted odds ratio.

^**Multivariate analysis was adjusted with age and T-classification. Sex and lymph node metastasis were omitted because of strong association with age and T-classification, respectively.