@article{oai:u-ryukyu.repo.nii.ac.jp:02011352,
 author = {Tanaka, Keiko and Miyake, Yoshihiro and Okubo, Hitomi and Hanioka, Takashi and Sasaki, Satoshi and Miyatake, Nobuyuki and Arakawa, Masashi},
 journal = {Nutrition Journal},
 month = {Nov},
 note = {Background: We investigated the relationships between calcium intake and the prevalence of periodontal disease. Methods: This cross-sectional study included 1162 women with a mean age of 31.5 years. Information on dietary factors was collected using a diet history questionnaire during pregnancy. Oral examinations were performed between one and twelve months postpartum. Periodontal disease was defined as positive if a woman had at least one tooth with a pocket depth of 4.0 mm or deeper. Adjustment was made for age, region of residence, smoking status, toothbrushing frequency, use of an interdental brush, household income, and education. Results: Compared with the lowest quartile of calcium intake, the highest quartile was significantly associated with a lower prevalence of periodontal disease; however, the inverse linear trend fell just short of the significance level: the adjusted odds ratio was 0.53 (95% confidence interval: 0.30–0.94, P for trend =0.07). Conclusions: Our findings suggest that higher calcium intake may be inversely associated with the prevalence of periodontal disease., 論文},
 title = {Calcium intake is associated with decreased prevalence of periodontal disease in young Japanese women},
 volume = {13},
 year = {2014}
}