Table 2. Strength of univariate associations between each characteristics and presence of nodal cancer (measured as univariate odds ratio) (N = 614).

Characteristic	OR	95% CI for OR		Pvalue
Age
40 or below	Ref
41 or more	0.76	0.34	1.68	0.50
Sex
female	Ref
male	1.06	0.71	1.59	0.78
Primary site of cancer
Buccal mucosa	Ref
Tongue	1.89	1.33	2.69	<0.01
Pattern of invasion (POI)
II	Ref
III	1.99	1.01	3.95	<0.01
IV	5.83	3.05	11.11
Size of the tumour (T)
T1	Ref
T2	2.79	1.05	7.44	<0.01
T3	8.27	3.15	21.70
T4	8.75	3.36	22.76
Depth of invasion(DOI)
1 to <2mm	Ref
2 to <3mm	0.80	0.34	1.89	<0.01
3 to <4mm	0.48	0.19	1.22
4 to <5mm	1.03	0.42	2.54
5+mm	1.78	0.90	3.53
Depth (Non-censored cases only, n = 382)
1 to <2mm	Ref
2 to <3mm	0.59	0.22	1.55	<0.01
3 to <4mm	0.42	0.15	1.20
4 to <5mm	0.54	0.15	1.92
5+mm	1.39	0.66	2.93

OR = odds ratio, CI = confidence interval