Table 1.

Characteristics of the study population with and without diabetes mellitus.

	Total (n = 5,281)		DM (n = 614)		Non-DM (n = 4,667)		p
Age (y)	67.90 ± 6.62		68.03 ± 6.49		67.88 ± 6.64		0.584
Gender
Male	2,526	47.83%	279	45.44%	2,247	48.15%
Female	2,755	52.17%	335	54.56%	2,420	51.85%	0.207
Occupation
Peasant	2,956	55.97%	346	56.35%	2,610	55.92%
Other	2,325	44.03%	268	43.65%	2,057	44.08%	0.841
Educational level
Illiterate or no education	2,566	48.59%	295	48.05%	2,271	48.66%
Primary education and above	2,715	51.41%	319	51.95%	2,396	51.34%	0.774
Individual monthly income
≤¥2000	4,327	81.98%	486	79.15%	3,841	82.35%
>¥2000	951	18.02%	128	20.85%	823	17.65%	0.052
Smoking
No	3,917	74.17%	481	78.34%	3,436	73.62%
Yes	1,364	25.83%	133	21.66%	1,231	26.38%	0.012
Alcohol consumption
No	4,094	77.52%	484	78.83%	3,610	77.35%
Yes	1,187	22.48%	130	21.17%	1,057	22.65%	0.410
Type of tea consumption
Non-tea consumption	3,469	65.69%	395	64.33%	3,074	65.87%
Green tea	1,619	30.66%	196	31.92%	1,423	30.49%
Non-green tea	193	3.65%	23	3.75%	170	3.64%	0.751
Frequency of tea consumption
Non-tea consumption	3,469	65.69%	395	64.33%	3,074	65.87%
1–5 times/week	192	3.64%	20	3.26%	172	3.69%
>5 times/week	1,620	30.68%	199	32.41%	1,421	30.45%	0.563
Duration of tea consumption (y)	10.25 ± 17.03		10.99 ± 17.73		10.13 ± 16.93		0.253

Note. DM: diabetes mellitus; non-DM: non-diabetes mellitus. Bold type indicates statistical significance (< 0.05).