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

Odds ratios are from a weighted survey multinomial logistic regression.Participants with mild bone loss are the reference group.*P≤0.05.Multinomial regression analysis of the associations between risk factors and the degree of alveolar bone loss.优势比（Odds Ratio）来源于加权调查多项逻辑回归（multinomial logistic regression）分析。以轻度骨丢失参与者作为参照组。*P≤0.05。针对危险因素与牙槽骨丢失（alveolar bone loss）程度之间关联的多项逻辑回归分析。