Genome-wide association study of periodontal pocketing in Finnish adults

BMC Oral Health

Table 1 Basic characteristics of the study populations

	Health 2000 Survey (N = 2068)	NFBC 1966 Study (N = 1838)
Age, years	30–65	46
Sex
Female	51.5	53.5
Male	48.5	46.5
Smoking status
Non-smoker	70.6	68.9
Current smoker	29.4	21.4
Missing data	0.0	9.7
Plaque^c, mean (SD)	1.8 (0.7)^a	1.4 (0.6)^b
Number of teeth with PD ≥ 4 mm^d, mean (SD)	4.7 (5.9)	2.0 (3.9)

SD standard deviation, PD pocket depth
^aThe mean of maximum plaque values (1, 2 or 3)
^bScale 1–3
^cData available of 1560 participants in the Health 2000 Survey and of 1809 participants in the NFBC 1966 Study
^dData available of 1860 participants in the Health 2000 Survey and of 1820 participants in the NFBC 1966 Study

ISSN: 1472-6831