Diagnostic performance of labial minor salivary gland flow measurement for assessment of xerostomia

Shizuko Satoh-Kuriwada, Masahiro Iikubo, Noriaki Shoji, Maya Sakamoto, Takashi Sasano

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Objective: Minor salivary gland flow rate (MF) has been proposed as a key feature of xerostomia (subjective feeling of dry mouth). To assess its diagnostic performance, MF was compared in xerostomia and control subjects. Design: Sixty-six subjects with xerostomia and 30 controls were enrolled. MF was measured in the lower labial mucosa using the iodine-starch filter paper method. Stimulated whole salivary flow rates were also measured using the gum test (stimulated-WF). Results: Both labial-MF and stimulated-WF were significantly lower in xerostomia subjects than in controls. There was a positive correlation between labial-MF and stimulated-WF in control but not xerostomia subjects. In xerostomia subjects compared to controls, there was a significantly larger reduction in labial-MF than in stimulated-WF. Xerostomia was most accurately diagnosed using a labial-MF cutoff value of 0.25 μL/cm2/min. The sensitivity, specificity, positive predictive value, negative predictive value, and diagnostic accuracy at this cutoff value were 1.00, 0.87, 0.93, 1.00, and 0.96, respectively. Compared to respective values of 0.64, 1.00, 1.00, 0.56, and 0.75 for stimulated-WF at the traditional cutoff of 1.0 mL/min, these data indicate the higher sensitivity, negative predictive value, and diagnostic accuracy of labial-MF. Conclusions: Xerostomia was more strongly related to reduction of labial-MF than to that of stimulated-WF. Xerostomia was most likely triggered at a labial-MF cut-off value of 0.25 μL/cm2/min based on results from the iodine-starch method.

Original languageEnglish
Pages (from-to)1121-1126
Number of pages6
JournalArchives of Oral Biology
Issue number8
Publication statusPublished - 2012 Aug


  • Diagnostic performance
  • Labial minor salivary gland flow rate
  • Xerostomia


Dive into the research topics of 'Diagnostic performance of labial minor salivary gland flow measurement for assessment of xerostomia'. Together they form a unique fingerprint.

Cite this