Dental Calculus Is Associated with Death from Heart Infarction

Table 2

Demographic clinical oral health data at the baseline examination in 1985 of 1676 subjects who were dead or alive by the follow-up year of 2011.

	Dead (𝑛=32); number, mean ± SD	Alive (𝑛=1644); number, mean ± SD	𝑃 value*
Gender (female/male)	15/17	823/821	NS
Age in 1985 (years)	35.3±2.9	35.7±2.9	<0.05
Education (compulsory school/higher)	7/25	284/1360	NS
Smoking (pack-year)	2592.8±3873.5	3394.4±4151.4	NS
Income (Swedish Crowns ×1000)	157.4±60.0	188.3±10.1	NS
Plaque index	0.78±0.48	0.71±0.49	NS
Gingival inflammation	1.28±0.50	1.28±0.53	NS
Calculus index	0.71±0.80	0.45±0.58	0.015
Periodontal pockets (𝑛)	0	0.90±2.87	0.001
Missing teeth	1.34±1.88	1.26±2.39	NS
Missing molars	0.53±1.03	0.53±1.23	NS

Data are expressed as mean ± SD.
∗Fisher’s exact 𝑡-test or Student’s 𝑡-test for unpaired samples as appropriate.