. Author manuscript; available in PMC: 2013 Jun 28.

Published in final edited form as: Cancer Causes Control. 2012 Aug 3;23(10):1635–1641. doi: 10.1007/s10552-012-0041-8

Table 1.

Distribution of selected factors by tea intake in the Singapore Chinese Health Study

	Frequency of green tea intake			Frequency of black tea intake
	None/monthly	Weekly	Daily	None/monthly	Weekly	Daily
Person-years	199,726	58,205	46,791	199,327	59,670	45,725
Mean age (SD), years	57 (8)	56 (8)	56 (8)	57 (8)	56 (8)	56 (8)
% with none or primary education only	64.3	56.9	58.3	65.0	56.0	56.1
% any weekly physical activity	40.3	48.4	49.5	40.9	48.7	46.8
% never smokers	41.1	45.9	42.5	40.2	47.4	44.3
Mean body mass index (SD), kg/m²	22.8 (3.2)	23.4 (3.2)	23.6 (3.2)	22.9 (3.2)	23.2 (3.2)	23.1 (3.2)
Weekly supplement use, % yes	4.4	5.7	5.6	4.3	5.9	5.5
Alcohol intake, % non-drinkers	70.0	65.3	66.6	69.2	66.6	68.1

SD standard deviation