Table 3 Age-standardised incidence rates (aSIRs), hazard ratios (HRs) and 95 percent confidence intervals (95% CIs) of non-fatal myocardial infarction (MI) by oral health status between 1973 and 2012.

	Cases of MI (N)	Person-years	aSIR (per 100,000 person-years)^*	Minimally-adjusted HR^† (95% CI)	Fully-adjusted HR^‡ (95% CI)
Number of teeth ^§
6	609	310,713	314.6	1.00	1.00
4–5	459	105,356	368.3	1.13 (0.99–1.29)	1.10 (0.96–1.25)
2–3	333	51,847	423.2	1.30 (1.12–1.52)	1.24 (1.06–1.44)
0–1	633	80,294	727.9	1.43 (1.24–1.65)	1.32 (1.14–1.53)
P-trend				<0.001	<0.001
Dental plaque
No plaque	248	100,536	286.7	1.00	1.00
Low	831	298,161	341.3	1.03 (0.89–1.19)	1.03 (0.89–1.19)
High	322	69,219	487.3	1.26 (1.06–1.49)	1.23 (1.03–1.47)
Not accurate^\|\|	633	80,294	727.9	—	—
Oral lesions
No lesions^#	1,189	399,745	348.1	1.00	1.00
Candida-related	145	24,487	434.8	1.17 (0.98–1.40)	1.10 (0.91–1.31)
Denture-related	590	85,835	439.2	1.25 (1.12–1.39)	1.20 (1.07–1.34)
Tongue	368	74,578	408.3	1.14 (1.01–1.28)	1.13 (1.00–1.28)

^*Age-standardised incidence rate per 100,000 person-years, standardised to the age distribution of person-years experienced by all participants, using 5-year age categories. ^†Minimally-adjusted HRs: All Cox proportional hazards regression models had attained age as the time scale, stratified by sex (male, female) and attained calendar period in 5-year intervals. ^‡Fully-adjusted HRs: All Cox proportional hazards regression models had attained age as time scale, adjusted for alcohol consumption (no/low, moderate/high) and area of residence (small town, rural, city) and stratified by sex (male, female), smoking and snus use (uses neither, smoker only, snus user only, uses both) and attained calendar period in 5-year intervals. ^§Number of teeth was assessed at baseline through examination of six reference teeth (tooth numbers 16, 21, 24, 36, 41, 44 using the Ramfjord teeth index). Minimally-adjusted model (n = 20,133); Fully-adjusted model (n = 20,125). ^||The measurement of dental plaque for individuals with only 0 or 1 of the reference teeth present was considered to not be accurate (n = 4,624). ^#Reference group included those without any evidence of Candida-related, denture-related, or tongue lesions.

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