Table 3.

Univariate and multivariable analysis of betel quid from birth until commencement of chewing betel quid

Variables	Item	Univariate			Multivariable
		Hazard Rate Ratio	95% Confidence Interval	P-value	Hazard Rate Ratio	95% Confidence Interval	P-value
Sex	Male	4.22	(3.74, 4.77)	<.0001	1.38	(1.20, 1.59)	<.0001
	Female	1.00			1.00
Education	Literate	0.30	(0.26, 0.34)	<.0001	0.47	(0.37, 0.61)	<.0001
	Primary school	1.01	(0.92, 1.12)	0.8400	0.92	(0.73, 1.17)	0.4969
	Junior high school	2.25	(2.00, 2.54)	<.0001	2.33	(1.83, 2.97)	<.0001
	Senior high school	2.58	(2.31, 2.89)	<.0001	2.51	(1.99, 3.17)	<.0001
	College and above	1.00			1.00
Occupation	Unemployed or non-technical	0.35	(0.31, 0.38)	<.0001	0.97	(0.69, 1.37)	0.8800
	Technical	3.12	(2.81, 3.47)	<.0001	2.09	(1.48, 2.96)	<.0001
	Semi-professional	1.73	(1.44, 2.09)	<.0001	1.52	(1.04, 2.20)	0.0288
	Managerial/professional and above	1.00			1.00
Ethnicity	Aborigines	4.41	(4.00, 4.87)	<.0001	4.38	(3.94, 4.87)	<.0001
	Non-aborigines	1.00			1.00
Cigarette smoker	Yes	7.04	(6.32, 7.85)	<.0001	4.10	(3.62, 4.63)	<.0001
	No	1.00			1.00
Alcohol drinker	Yes	4.46	(4.04, 4.92)	<.0001	1.73	(1.56, 1.92)	<.0001
	No	1.00			1.00