Table 3 Multiple logistic regression analysis between periodontitis severity and carotid intima-media thickness ≥ 0.8 mm in military young adults.

	Crude model			Model 1			Model 2
	OR	95% CI	p value	OR	95% CI	p value	OR	95% CI	p value
Periodontitis
Stage I	1.73	0.82–3.64	0.14	1.41	0.60–3.30	0.42	1.41	0.60–3.29	0.43
Stage II	1.84	0.97–3.50	0.06	1.62	0.79–3.29	0.18	1.62	0.79–3.31	0.18
Stage III	3.65	1.83–7.28	< 0.001	3.19	1.42–7.14	0.005	3.20	1.42–7.18	0.005
p value for trend			< 0.001			0.001			0.004
Central obesity (waist circumference ≥ 90 cm for men and ≥ 80 cm for women)	1.82	1.17–2.85	0.008	1.15	0.68–1.95	0.61	1.19	0.59–2.39	0.63
Hypertension (blood pressure ≥ 130/85 mmHg)	1.50	0.96–2.33	0.07	1.34	0.81–2.20	0.25	1.35	0.81–2.23	0.25
Total cholesterol ≥ 200 mg/dL	2.12	1.35–3.43	0.001	1.42	0.77–2.62	0.26	1.42	0.77–2.61	0.26
LDL-C > 100 mg/dL	1.60	1.02–2.49	0.04	1.23	0.71–2.12	0.46	1.23	0.71–2.14	0.45
HDL-C < 40 mg/dL	1.07	0.60–1.89	0.83	1.00	0.53–1.88	0.99	1.00	0.53–1.88	0.99
Triglycerides ≥ 150 mg/dL	1.68	1.03–2.72	0.03	1.03	0.57–1.86	0.92	1.04	0.57–1.89	0.90
Fasting glucose ≥ 100 mg/dL	1.15	0.70–1.90	0.57	0.73	0.40–1.32	0.29	0.73	0.40–1.33	0.29
Hyperuricemia (uric acid ≥ 7.0 mg/dL for men and ≥ 6.0 mg/dL for women)	1.20	0.78–1.86	0.40	1.26	0.79–2.02	0.33	1.26	0.79–2.03	0.33
Leucocyte counts ≥ 7.6 10³/µL	1.77	1.10–2.86	0.01	1.86	1.11–3.10	0.01	1.86	1.11–3.12	0.01

Data are presented as odds ratios (OR) and 95% confidence intervals (CI) using multiple logistic regression analysis.
Multiple logistic regression model was additionally adjusted with age, sex, tooth brushing frequency, alcohol intake and tobacco smoking in Model 1; BMI was further adjusted in Model 2.
LDL-C low density lipoprotein cholesterol, HDL-C high density lipoprotein cholesterol.

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