Table 4. Multinomial regression analysis of the associations between risk factors and the degree of alveolar bone loss.

	Moderate bone lossOR (95%IC)	Severe bone lossOR (95%IC)
Age
40–45	1.03 (0.37, 1.52)	1.89 (1.14, 2.35)
46–50	1.58 (0.71, 1.97)	2.12 (1.04, 3.96)*
51–55	1.38 (0.97, 2.93)*	1.96 (0.73, 2.85)*
56–59	2.97 (1.06, 4,31)*	3.86 (2.13, 6.94)*
Gender
(male = 0,female = 1)	11.18 (0.28, 34.96)*	10.82 (4.78, 24.51)*
Smoking
(non-smoking = 0,smoking = 1)	1.44 (0.75, 3.69)*	1.95 (1.01, 3.56)*
Menopause
(non-menopause = 0,menopause = 1)	2.15 (1.07, 9.71)*	4.35 (2.19, 6.51)*

Odds ratios are from a weighted survey multinomial logistic regression.

Participants with mild bone loss are the reference group.

*P≤0.05.