Betel nut chewing and incidence of newly diagnosed type 2 diabetes mellitus in Taiwan.

BMC Research Notes

Table 3 Age-specific incidence rates (per 100,000 population) and incidence rate ratios (RR) for newly diagnosed type 2 diabetes mellitus for ever chewers vs. never-chewers during the years 1992-1996

Year	Age (years)	Observed incident case		Incidence rate*		Incidence RR (Ever chewers vs. never-chewers)
		Ever chewers	Never-chewers	Ever chewers	Never-chewers
1992	< 40	11	33	3.6	2.9	1.25
	40-49	66	152	229.1	89.6	2.56
	50-59	107	326	1145.6	241.3	4.75
	60-69	140	547	6997.8	423.5	16.52
	≥70	64	428	627.3	700.5	0.90
1993	< 40	19	39	6.2	3.4	1.83
	40-49	83	235	272.0	130.7	2.08
	50-59	209	494	2228.8	364.2	6.12
	60-69	216	774	10717.2	594.9	18.02
	≥70	96	661	882.8	1015.0	0.87
1994	< 40	31	68	10.1	5.9	1.71
	40-49	170	384	524.6	201.2	2.61
	50-59	259	652	2747.8	478.3	5.75
	60-69	259	951	12791.4	727.5	17.58
	≥70	99	790	853.3	1137.0	0.75
1995	< 40	48	126	15.7	11.0	1.43
	40-49	207	459	599.3	225.6	2.66
	50-59	241	682	2580.6	504.9	5.11
	60-69	206	877	10288.9	678.5	15.16
	≥70	84	668	680.9	904.2	0.75
1996	< 40	92	218	30.2	19.1	1.58
	40-49	193	549	520.9	251.5	2.07
	50-59	239	764	2566.9	567.3	4.52
	60-69	231	922	11672.8	721.7	16.17
	≥70	83	766	630.3	971.4	0.65

*The nominators for the incidence rates are the observed incident case number multiplied by a correction factor of 5.74 (please refer to the section 'Methods') and the denominators are the respective age-specific mid-year population of the male-sex in the specific year.

ISSN: 1756-0500