Taguchi Akira, Nagai Kazue, Ideno Yuki, Kurabayashi Takumi, Hayashi Kunihiko
Department of Oral and Maxillofacial Radiology, School of Dentistry, Matsumoto Dental University, Shiojiri, Japan.
Department of Hard Tissue Research, Graduate School of Oral Medicine, Matsumoto Dental University, Shiojiri, Japan.
Womens Health Rep (New Rochelle). 2020 Sep 15;1(1):366-374. doi: 10.1089/whr.2020.0066. eCollection 2020.
Parity is thought to be associated with a decreased number of teeth present in women. However, educational level and social status, which are particularly significant risk factors for loss of teeth, have been heterogeneous in previous observations. This cross-sectional survey aimed to clarify the associations of parity with the risk of having <20 teeth in Japanese female nurses participating in the Japan Nurses' Health Study (JNHS). In the third follow-up questionnaire of the JNHS, 11,299 women aged 27-82 years participated in this study. The number of participants according to age range was 7,225 (63.9%) aged <50 years and 4,074 (36.1%) aged ≥50 years. Information on parity and risk factors for loss of teeth was collected through a baseline questionnaire and then a follow-up questionnaire. Multivariate logistic regression analysis was used to calculate the adjusted odds ratio (OR) and 95% confidence interval (CI) of having <20 teeth according to parity category. Participants ≥50 years who had experienced three or more deliveries had a significantly higher risk of having <20 teeth than those who had not experienced delivery (OR = 1.59, 95% CI = 1.14-2.20), although this finding was not observed in participants <50 years. In addition to parity, age and current smoking may be independent risk factors for having <20 teeth in Japanese nurses. Higher-parity female nurses ≥50 years may be more likely to lose teeth than those who have not experienced delivery.
人们认为生育次数与女性牙齿数量减少有关。然而，教育水平和社会地位作为牙齿缺失的特别重要的风险因素，在以往的观察中存在异质性。这项横断面调查旨在阐明参与日本护士健康研究（JNHS）的日本女性护士的生育次数与牙齿少于20颗的风险之间的关联。在JNHS的第三次随访问卷中，11299名年龄在27 - 82岁的女性参与了本研究。按年龄范围划分的参与者数量为：年龄小于50岁的有7225人（63.9%），年龄大于或等于50岁的有4074人（36.1%）。通过基线问卷和后续问卷收集了生育次数和牙齿缺失风险因素的信息。采用多因素逻辑回归分析来计算根据生育类别牙齿少于20颗的调整优势比（OR）和95%置信区间（CI）。年龄大于或等于50岁且经历过三次或更多次分娩的参与者牙齿少于20颗的风险显著高于未经历过分娩的参与者（OR = 1.59，95% CI = 1.14 - 2.20），尽管在年龄小于50岁的参与者中未观察到这一结果。除生育次数外，年龄和当前吸烟可能是日本护士牙齿少于20颗的独立风险因素。年龄大于或等于50岁且生育次数较多的女性护士可能比未经历过分娩的女性护士更容易掉牙。
