. Author manuscript; available in PMC: 2010 Jun 15.

Published in final edited form as: Int J Cancer. 2006 Jun 15;118(12):3089–3094. doi: 10.1002/ijc.21748

TABLE II.

Odds Ratios (ORs) and 95% Confidence Intervals (CI) for Biliary Tract Cancers and Stones in Relation to Tea Drinking by Gender

	MALE									FEMALE

	Gallbladder Cancer			Bile Duct Cancer			Biliary Stones				Gallbladder Cancer			Bile Duct Cancer			Biliary Stones

	Cases / Controls	OR¹	95% CI	Cases / Controls	OR¹	95% CI	Cases / Controls	OR²	95% CI		Cases / Controls	OR¹	95% CI	Cases / Controls	OR¹	95% CI	Cases / Controls	OR²	95% CI
Tea Drinking Status										Tea Drinking Status
Never	39/126	1.00	-	35/133	1.00	-	130/110	1.00	-	Never	228/402	1.00	-	75/432	1.00	-	495/311	1.00	-
Ever³	60/231	0.82	0.52-1.30	64/240	1.03	0.64-1.64	260/203	0.98	0.70-1.35	Ever³	41/143	0.56	0.38-0.83	17/154	0.65	0.37-1.14	152/111	0.73	0.54-0.98
Age started drinking (years)										Age started drinking (years)
<30	36/101	1.12	0.66-1.91	38/104	1.42	0.84-2.42	137/85	1.16	0.79-1.70	<35	18/66	0.55	0.32-0.95	3/68	0.26	0.08-0.85	87/51	0.87	0.59-1.30
≥30	24/130	0.59	0.33-1.04	26/136	0.73	0.42-1.29	123/118	0.84	0.58-1.22	≥35	23/77	0.57	0.35-0.94	14/86	0.94	0.51-1.75	65/60	0.61	0.41-0.90
			P_trend=0.75			P_trend=0.22			P_trend=0.50				P_trend=0.01			P_trend=0.04			P_trend=0.15
Duration of drinking (years)										Duration of drinking (years)
<30	23/113	0.63	0.35-1.14	28/114	0.90	0.51-1.59	134/105	0.86	0.59-1.26	<20	19/63	0.58	0.33-0.99	11/69	0.93	0.47-1.86	75/46	0.76	0.50-1.16
≥30	37/118	0.99	0.59-1.69	36/126	1.15	0.67-1.96	126/98	1.11	0.76-1.64	≥20	22/80	0.55	0.33-0.91	6/85	0.41	0.17-0.98	77/65	0.70	0.48-1.02
			P_trend=0.92			P_trend=0.63			P_trend=0.65				P_trend=0.01			P_trend=0.04			P_trend=0.04
Monthly intake (grams)										Monthly intake (grams)
<250	29/91	1.01	0.58-1.76	24/94	0.99	0.56-1.79	134/81	1.33	0.90-1.97	<150	20/81	0.51	0.33-0.86	7/86	0.48	0.21-1.08	77/65	0.60	0.41-0.88
≥250	28/140	0.63	0.37-1.09	40/146	1.04	0.62-1.75	126/122	0.75	0.52-1.09	≥150	21/60	0.64	0.38-1.08	10/66	0.88	0.43-1.78	72/44	0.91	0.60-1.38
			P_trend=0.10			P_trend=0.87			P_trend=0.13				P_trend=0.01			P_trend=0.32			P_trend=0.17
Lifetime consumption (grams)⁴										Lifetime consumption (grams)⁴
<81,600	29/116	0.79	0.46-1.37	30/119	0.96	0.56-1.67	151/107	1.05	0.72-1.51	<24,600	19/72	0.52	0.30-0.89	7/76	0.54	0.24-1.22	69/56	0.62	0.42-0.94
≥81,600	28/115	0.77	0.44-1.33	34/121	1.09	0.64-1.86	109/96	0.89	0.61-1.32	≥24,600	22/69	0.62	0.37-1.03	10/76	0.77	0.38-1.55	80/53	0.83	0.56-1.23
			P_trend=0.33			P_trend=0.76			P_trend=0.59				P_trend=0.01			P_trend=0.24			P_trend=0.12

Odds ratios for gallbladder and bile duct cancer were adjusted for age at interview and education status

Odds ratios for biliary stones were adjusted for age at interview, education, and body mass index

Drink at least one cup of tea per day for 6 months

⁴

Lifetime consumption=monthly intake (grams) × 12 (months) × duration of drinking (years)