Oral health status of the ethnic group Xukuru from Ororubá: multilevel analysis

Objective: To analyse the oral health status of the indigenous people Xukuru from Ororubá aged 10 to 14 years old, in Pernambuco, Brazil. Method: A cross-sectional population-based study developed within the limits of the Indigenous Land Xukuru, from January to March 2010. Oral examinations were performed on a sample of 233 indigenous people. The software SPSS 13.0® was used for descriptive analysis. Later, in order to measure the effect of factors associated with the absence of caries, Poisson log-linear multilevel models were tested with the statistical software MLwiN 2.02®. Results: Oral examinations identified a DMFT Index average of 2.38 (± 2.62). Among all individuals examined, 26.61% were caries free. Multiple regression analysis revealed a negative association between the absence of caries and the variables: higher average of people per household in the villages, higher number of residents per household, older age, male sex, not knowing how to read and write, and very dissatisfied/dissatisfied with teeth/mouth. The variables higher income per capita, not sleeping due to dental problems, had never been to the dentist, no occurrence of toothache, and no need for dental treatment were positively associated with the absence of caries. Conclusion: The absence of caries is associated with contextual and individual factors of the indigenous people Xukuru from Ororubá, aged 10 to 14 years old.

研究目标：本研究旨在分析巴西伯南布哥州Ororubá地区Xukuru原住民10至14岁群体的口腔健康状况。
研究方法：本研究于2010年1月至3月在Xukuru原住民领地范围内开展，为基于人群的横断面研究。研究对233名原住民组成的样本实施口腔检查，采用SPSS 13.0®软件进行描述性分析。后续为探究与无龋状态相关的影响因素，借助统计软件MLwiN 2.02®构建泊松对数线性多层模型开展检验。
研究结果：口腔检查结果显示，受试者的龋失补指数（DMFT）平均值为2.38（±2.62）。受检个体中26.61%无龋。多元回归分析结果表明，无龋状态与以下变量呈负相关：村庄内家庭人均居住人数更高、每户居民数量更多、年龄偏大、男性性别、不具备读写能力，以及对牙齿/口腔状况非常不满意或不满意。而人均收入更高、因牙科问题失眠、从未就诊过牙医、未出现牙痛以及无需牙科治疗等变量，则与无龋状态呈正相关。
研究结论：巴西伯南布哥州Ororubá地区Xukuru原住民10至14岁群体的无龋状态，与其所处的环境因素及个体因素密切相关。