title: Relationship between body fat and masticatory function.
abstract: OBJECTIVE
  The aim of this cross-sectional study was to investigate the relationship between body fat and masticatory function.
  
  
  METHODS
  One hundred dentate and partially edentulous participants (33 male; mean age, 39.7 ± 16.6 years) were selected. Body fat was established through body mass index (BMI). Masticatory function was evaluated by quantifying occlusal pairs and determining masticatory efficiency and swallowing threshold with the sieving method. During the swallowing threshold test, chewing rate was registered. Masticatory ability was also evaluated with a 5-point Likert scale questionnaire. Data were analyzed with Spearman and chi-square tests, as well as binary logistic regression analysis for the presence of increased BMI (α= 0.05).
  
  
  RESULTS
  Age (rho = 0.517), occlusal pairs (chi-square = 26.353), masticatory efficiency (chi-square = 30.935), masticatory ability (chi-square = 25.132; p < 0.001), and swallowing threshold (chi-square = 8.730; p < 0.005) were related to BMI. Age (odds ratio, OR = 1.048, 95% CI = 1.008 to 1.089) and lower masticatory efficiency (OR = 4.792, 95% CI = 1.419 to 16.183) were predictive of increased body fat (p < 0.05). Gender (chi-square = 0.402, p= 0.526) and chewing rate (rho =-0.158, p= 0.117) were not related to BMI.
  
  
  CONCLUSIONS
  These results suggest that people with lower masticatory efficiency may be at risk for increased body fat.
authors.affiliation: Department of Dentistry, State University of Ponta Grossa, Ponta Grossa, Brazil.
authors.forename: Alfonso
authors.initials: A
authors.lastname: Sánchez-Ayala
authors.forename: Nara Hellen
authors.initials: NH
authors.lastname: Campanha
authors.forename: Renata Cunha Matheus Rodrigues
authors.initials: RC
authors.lastname: Garcia
mesh_terms: D000273:Adipose Tissue / Q000033:anatomy & histology*; D000328:Adult; D000818:Animals; D015992:Body Mass Index; D001939:Bread; D003430:Cross-Sectional Studies; D003679:Deglutition / Q000502:physiology; D003817:Dentition; D003830:Denture, Partial, Fixed; D005260:Female; D005638:Fruit; D006801:Humans; D007576:Jaw, Edentulous, Partially / Q000503:physiopathology; D008297:Male; D008409:Mastication / Q000502:physiology*; D008460:Meat; D008875:Middle Aged; D009765:Obesity / Q000503:physiopathology; D050177:Overweight / Q000503:physiopathology; D010316:Particle Size; D012684:Sensory Thresholds / Q000502:physiology; D012826:Silicone Elastomers / Q000737:chemistry; D014675:Vegetables
chemical_list: D012826:Silicone Elastomers