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Table 1 Background characteristics of participants

From: Periodontal conditions in a 65-year-old population and prevalence of periodontitis according to three different bone level thresholds

Participants' characteristics

n (%)

(N = 454)

Gender

Men

233 (51.3)

Women

221 (48.7)

Country of birth

Western

413 (91.0)

Non-western

41 (9.0)

Education level

Higher education

304 (67.0)

Basic education

150 (33.0)

Smoking

Never-smoker

197 (43.4)

Former-smoker

210 (46.3)

Smoker < 10/day

18 (4.0)

Smoker ≥ 10/day

29 (6.4)

Diabetes

No

420 (92.5)

Type 1

4 (0.9)

Type 2

30 (6.6)