Table 4 Logistic regression showing socio-demographic characters, habits and periodontal parameters in relation to CP

 • Male

1 (Reference)

 • Female

0.7 (0.3–1.4)

 • Primary

1 (Reference)

 • Secondary and Tertiary

0.5 (0.2–1.2)

 • Non Malays

1 (Reference)

 • Malays

0.5 (0.2–1.2)

 • Yes

1 (Reference)

 • No

0.6 (0.3–1.3)

 • Yes

1 (Reference)

 • No

0.5 (0.2–1.7)

 • <2 years

1 (Reference)

 • ≥2 year

2.6 (1.4–6.5)*

 • Never

1.7 (0.6–4.7)

 • ≥2times/day

1 (Reference)

 • 1 time/day

0.9 (0.3–2.4)

 • Obese I

1 (Reference)

 • Obese II

1.8 (0.7–4.9)

 • Obese III

3.2 (0.7–8.9)

 • ≤30 %

1 (Reference)

 • ≥30 %

5.0 (2.3–10.7)*

 • ≤20 %

1 (Reference)

 • ≥20 %

4.3 (1.7–10.9)*