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Table 1 Odds ratios of low salivary amylase for high serum ketones and low RQ

From: The association of low serum salivary and pancreatic amylases with the increased use of lipids as an energy source in non-obese healthy women

 Normal-high serum salivary amylase N = 27Low serum salivary amylase N = 33P values
High serum 3-HBA, n (%)10 (32.3)21 (67.7)
 Odds ratios (95% ICs)
Model 11 (reference)2.98 (1.04–8.55)0.04
Model 21 (reference)3.40 (1.12–10.3)0.03
Model 31 (reference)4.40 (1.32–14.7)0.02
High serum AA, n (%)9 (33.3)23 (69.7)P values
 Odds ratios (95% ICs)
Model 11 (reference)4.60 (1.54–13.7)0.006
Model 21 (reference)5.42 (1.70–17.3)0.004
Model 31 (reference)6.64 (1.91–23.1)0.003
Low RQ, n (%)7 (25.9)13 (39.4)P values
 Odds ratios (95% ICs)
Model 11 (reference)1.86 (0.61–5.63)0.27
Model 21 (reference)1.96 (0.62–6.21)0.25
Model 31 (reference)1.87 (0.56–6.20)0.31
  1. Model 1: unadjusted
  2. Model 2: adjusted for age and BMI as continuous variables
  3. Model 3: model 2 with additional adjustments for HbA1c and eGFR as continuous variables
  4. Low serum salivary amylase: < 60 U/L (vs. normal-high serum salivary amylase, ≥ 60 U/L)
  5. High serum 3-Hydroxybutyric acid ≥ 24 μmol/L (vs. normal serum 3-Hydroxybutyric acid, < 24 μmol/L)
  6. High serum acetoacetic acid ≥ 17 μmol/L (vs. normal serum acetoacetic acid, < 17 μmol/L)
  7. Low RQ: < 0.766 (vs. normal-high RQ, ≥ 0.766)
  8. AA, acetoacetic acid; BMI, body mass index; eGFR, estimated glomerular filtration rate; 3-HBA, 3-Hydroxybutyric acid; RQ, respiratory quotient