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Table 1 Characteristics of the study population by sex

From: Estimation of salt intake by 24-hour urinary sodium excretion: a cross-sectional study in Yantai, China

  Men (n 98) Women (n 93) Total (n 191) Statistical value P value
Age (years) 42.6 ± 13.2 41.5 ± 13.7 42.3 ± 13.5 0.53 0.600
Height (cm) 171.5 ± 6.4 158.6 ± 6.5 165.1 ± 9.1 13.93 <0.0001
Weight (kg) 73.8 ± 12.7 62.5 ± 11.8 68.4 ± 13.4 6.38 <0.0001
BMI (kg/m2) 25.1 ± 4.1 24.9 ± 4.5 25.0 ± 4.3 0.33 0.743
Waist circumference (cm) 86.7 ± 11.5 80.1 ± 11.3 83.6 ± 12.0 3.99 <0.0001
Blood pressure      
  Systolic (mmHg) 128.0 ± 19.9 118.0 ± 19.4 123.5 ± 20.3 3.54 0.001
  Diastolic (mmHg) 82.8 ± 12.0 77.1 ± 11.6 80.2 ± 12.1 3.32 0.001
Urinary excretion      
  Volume (ml/d) 1509 ± 571 1370 ± 578 1442 ± 577 1.68 0.094
  Creatinine (mmol/d) 11.0 ± 2.3 7.6 ± 1.6 9.4 ± 2.6 11.34 <0.0001
  Sodium (mmol/d) 218.3 ± 81.4 183.8 ± 69.8 201.5 ± 77.7 3.14 0.002
  Potassium (mmol/d) 45.9 ± 17.9 47.7 ± 27.7 46.8 ± 23.2 −0.53 0.594
Sodium-to-potassium ratio 5.2 ± 2.2 4.6 ± 2.2 4.9 ± 2.2 1.97 0.05
Salt intake (g/d) 12.8 ± 4.8 10.8 ± 4.1 11.8 ± 4.5 3.14 0.002