Table 1.
Characteristics of the study population and the correlation between salivary conductivity and continuous variables.
| All (N = 214) | Pearson r | p Value for r | |
|---|---|---|---|
| Salivary conductivity, ms/cm | 5.91 ± 1.79 | ||
| Demographics | |||
| Age, years | 63.96 ± 13.53 | 0.362 | <0.01 |
| Gender (male), n (%) | 71 (33.2) | ||
| Body weight, kg | 63.08 ± 10.79 | 0.049 | 0.48 |
| Body height, cm | 158.97 ± 7.67 | 0.037 | 0.59 |
| Body mass index, kg/m2 | 24.90 ± 3.36 | 0.027 | 0.69 |
| Systolic blood pressure, mmHg | 131.26 ± 20.74 | 0.193 | <0.01 |
| Diastolic blood pressure, mmHg | 75.24 ± 11.79 | 0.046 | 0.50 |
| Comorbid conditions, n (%) @ | |||
| Diabetes mellitus | 26 (12.1) | ||
| Hypertension | 62 (29.0) | ||
| Chronic kidney disease | 3 (1.4) | ||
| Ischemic heart disease/stroke | 16 (7.5) | ||
| Dyslipidemia | 30 (14.0) | ||
| Gout | 9 (4.2) | ||
| Chronic liver disease | 24 (11.2) | ||
| Laboratory parameters | |||
| BUN, mg/dL | 15.26 ± 5.28 | 0.178 | <0.01 |
| Creatinine, mg/dL | 0.81 ± 0.26 | 0.251 | <0.01 |
| eGFR, mL/min/1.73 m2 | 86.33 ± 22.81 | −0.323 | <0.01 |
| Serum osmolality, mOsm/kgH2O | 287.69 ± 5.48 | 0.106 | 0.12 |
| Fasting glucose, mg/dL | 103.09 ± 25.31 | 0.153 | 0.03 |
| Hemoglobin A1c, % | 5.89 ± 0.98 | 0.045 | 0.51 |
| ALT, U/L | 22.10 ± 20.91 | 0.027 | 0.70 |
| Triglyceride, mg/dL | 113.19 ± 74.33 | 0.105 | 0.13 |
| Total cholesterol, mg/dL | 198.86 ± 39.48 | −0.056 | 0.41 |
| LDL-C, mg/dL | 120.77 ± 33.63 | −0.066 | 0.33 |
| HDL-C, mg/dL | 55.56 ± 13.22 | −0111 | 0.11 |
Values are expressed as the mean ± standard deviation or number (percentage). @ The information of comorbid conditions was obtained by questionnaires. Abbreviations: ALT, alanine aminotransferase; BUN, blood urea nitrogen; eGFR, estimated glomerular filtration rate; HDL-C, high-density lipoprotein cholesterol; LDL-C, low-density lipoprotein cholesterol.