Objective:

To know the real prevalence of burning mouth syndrome (BAS) and the possible associated risk factors.

Material and methods:

Observational, descriptive, cross-sectional, population-based study with simple random selection in people over 24 years of age. After showing up randomly, in 2015 a telephone call was made to identify patients who met the inclusion criteria. They underwent a face-to-face interview, ruling out the presence of oral lesions, anxiety, depression and analytical tests were performed. A cohort of patients already diagnosed from the Ciudad Real Dermatology Hospital database was added to analyze the possible associated risk factors compared with a control group. Characteristics of BMS patients and non-ABS controls were statistically analyzed with SPSS v 21 and chi-square test and Odds Ratio (OR) were used to assess differences in group characteristics. Significance statistic was set at p < 0.05.

Results:

The prevalence was 0.84 % (95 % CI 0.28-1.4). The factors that reached statistical significance in the development of BMS were the following: female sex p < 0.05 (CI 1.43-2.20), history of anxiety p < 0.05 (CI 6.4-72.47) depression p < 0.05 (CI 3.-34.40), oral candidiasis p < 0.05 (CI 1.44-16.27); and nutritional deficit p < 0.05 (CI 4.1-100.05); fear of cancer p < 0.05 (CI 1-1.36); hypothyroidism p < 0.05 (CI 1.06-31.48) and use of dental prostheses p < 0.05 (CI 1.06-32,48). Taking antidepressants p < 0.05 CI (7.28-177.86) and anxiolytics p < 0.05 (CI 7.56-99.67). The presence of subjective dry mouth p < 0.05 (IC 1.81-17,94) and objective p < 0.05 (IC 1.47-14.57). Having altered the Anxiety Questionnaire p < 0.05 (CI 10.64-183.29); and depression p < 0.05 (CI: 5.48-132.92).

Conclusions:

The prevalence of BMS in the Ciudad Real area is 0.84 per hundred inhabitants. Although it may have a multifactorial origin, there could be an association with the female gender, a history of anxiety, depression, the use of dental prostheses, hypothyroidism infection by oral candidiasis, the use of antidepressants, anxiolytics, fear of cancer, subjective oral sequelae and current states of anxiety and depression.

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