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

From: Urinary sodium-to-potassium ratio: a simple and useful indicator of diet quality in population-based studies

Variables Tertile 1 (n = 622) Tertile 2 (n = 621) Tertile 3 (n = 621) P-value
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 0.504
Men (%) 44.7 47.2 49.4 0.255
Body mass index (kg/m2) 27.9 ± 5.2 27.8 ± 5.0 27.4 ± 5.0 0.159
Waist circumference (cm) 93.1 ± 12.7 93.2 ± 11.8 92.7 ± 12.3 0.745
Fasting plasma glucose (mg/dL) 96.80 ± 27.50 98.34 ± 32.77 95.71 ± 24.65 0.265
Systolic blood pressure (mmHg) 11.20 ± 1.54 11.27 ± 1.69 11.27 ± 1.62 0.727
Diastolic blood pressure (mmHg) 7.51 ± 0.93 7.59 ± 1.04 7.60 ± 1.06 0.247
TG/HDL ratio 3.61 ± 3.70 3.54 ± 3.72 3.26 ± 2.86 0.168
  1. Data are mean ± SD (unless stated otherwise)
  2. TG triglyceride, HDL high-density lipoprotein
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