Table 1 Demographic characteristics, anthropometric and biochemical values of participants across tertiles of Na-to-K ratio: Tehran Lipid and Glucose Study

Urinary Na-to-K ratio

 Range

< 1.49

1.49–2.37

> 2.37

 Median

1.03

1.89

3.20

Age (years)

43.4 ± 13.8

44.2 ± 13.8

43.3 ± 14.3

Men (%)

44.7

47.2

49.4

Body mass index (kg/m²)

27.9 ± 5.2

27.8 ± 5.0

27.4 ± 5.0

Waist circumference (cm)

93.1 ± 12.7

93.2 ± 11.8

92.7 ± 12.3

Fasting plasma glucose (mg/dL)

96.80 ± 27.50

98.34 ± 32.77

95.71 ± 24.65

Systolic blood pressure (mmHg)

11.20 ± 1.54

11.27 ± 1.69

11.27 ± 1.62

Diastolic blood pressure (mmHg)

7.51 ± 0.93

7.59 ± 1.04

7.60 ± 1.06

TG/HDL ratio

3.61 ± 3.70

3.54 ± 3.72

3.26 ± 2.86