Association of salivary <i>Porphyromonas gingivalis</i> with frequency of meals, smoking history and oral care in pregnant women: a cross-sectional study

DOI Open Access
  • Shibata Ai
    Saiseikai Yokohamashi Tobu Hospital 6th floor West Ward
  • Fujita Megumi
    Department of Clinical Nursing, Graduate School of Medical Science, Yamagata University
  • Yamaguchi Sanae
    Department of Midwifery and Maternal Nursing, School of Nursing, Fukushima Medical University
  • Yoshimura Momoka
    Department of Clinical Nursing, Graduate School of Medical Science, Yamagata University
  • Murakami-Sekimata Akiko
    Department of Life Sciences and Nursing, Graduate School of Nursing, Fukushima Medical University
  • Sekimata Masayuki
    Radioisotope Research Center, School of Medicine, Fukushima Medical University
  • Haruna Megumi
    Division of Health Sciences & Nursing, Graduate School of Medicine, The University of Tokyo

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Other Title
  • 妊婦の唾液中<i>Porphyromonas gingivalis</i>量と食事回数・喫煙歴・口腔ケアとの関連：横断研究

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Purpose: To examine the relationships between the density of Porphyromonas gingivalis (P. gingivalis) in the saliva of pregnant women and meal frequency, smoking history and oral care. Methods: Seventy-five pregnant women were asked to complete an online self-administered questionnaire, and their saliva samples were collected. Quantitative detection of P.gingivalis in saliva during pregnancy was performed by real-time polymerase chain reaction. The associations of salivary P. gingivalis with the number of meals, oral care, and smoking history in the second and third trimesters of pregnancy were assessed using the Mann-Whitney U test and Spearman.s rank correlation analysis. Results: No association between the number of meals and density of P. gingivalis was observed in the second and third trimesters. However, smoking history was significantly associated with increased density of P. gingivalis in both the second (P = 0.007) and third trimesters (P < 0.001). In addition, tooth brushing frequency was negatively correlated with the density of P. gingivalis in the third trimester (rs=-0.270, P = 0.04). Conclusion: Our study suggest that a history of smoking and less frequent tooth brushing are associated with increased density of P. gingivalis.

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