TABLE 2.

Univariate logistic regression analysis for the association of GBoB estimates with different periodontal status

Variables	Periodontal case definitions
	Gingivitis vs. periodontal health	Periodontitis vs. periodontal health	Periodontal disease vs. periodontal health
	Crude OR (95% CI)	Crude OR (95% CI)	Crude OR (95% CI)
Self‐reported GBoB	8.87 (3.81–20.64)***	3.31 (1.62–6.77)***	3.98 (1.96–8.06)***
Hb concentration	1.005 (1.002–1.009)**	1.004 (1.001–1.007)*	1.004 (1.001–1.007)**
Total amount of Hb	1.033 (1.019–1.047)***	1.018 (1.010–1.026)***	1.019 (1.011–1.027)***

Variables	Gingival inflammatory status
	Gingival inflammation vs. minimal inflammation	Localized gingival inflammation vs. minimal inflammation	Generalized gingival inflammation vs. minimal inflammation
	Crude OR (95% CI)	Crude OR (95% CI)	Crude OR (95% CI)
Self‐reported GBoB	4.16 (2.26–7.67)***	3.16 (1.68–5.95)***	7.55 (3.76–15.15)***
Hb concentration	1.005 (1.002–1.008)**	1.004 (1.001–1.007)**	1.009 (1.005–1.013)***
Total amount of Hb	1.024 (1.016–1.032)***	1.023 (1.015–1.031)***	1.035 (1.023–1.046)***

Note: Please see text for details of the periodontal case definitions and the gingival inflammatory status. ***p < .001; **p < .01; *p < .05.

Abbreviations: 95% CI, confidence interval of 95%; OR, odds ratio.