Blood Pressure in relation to 24-Hour Urinary Sodium and Potassium Excretion in a Uruguayan Population Sample
Table 2
Sensitivity analysis according to BMI, age quartiles, sex, blood pressure status, and eGFR.
Mean (SD) characteristic
N
UNa (mmol/d)
UNa-BW (mmol/kg/d)
Na/Cr ratio
UK (mmol/d)
K/Cr ratio
Urinary volume (L/24-h)
Urinary urea excretion (g/d)
Urinary Osmolality♯ (mOsm/kg)
All
149
152.9±57.3
2.07±0.70
2.62±0.95
55.4±19.6
1.61±0.51
1.56±0.64
22.3±8.5
417.3±136.8
BMI (Kg/m2)
Normal
43
117.8±43.3
1.94±0.68
2.44±0.86
46.6±12.2
1.67±0.55
1.41±0.57
17.9±6.3
327.0±73.4
Overweight
66
158.3±51.9
2.10±0.66
2.67±1.01
59.7±23.0
1.67±0.55
1.63±6.93
23.2±9.9
426.5±138.1
Obesity
38
183.3±62.0
2.08±0.65
2.69±0.94
58.8±16.2
1.46±0.34
1.65±5.87
26.1±6.2
496.6±137.2
Age (y)
< 41
42
165.1±57.6
2.23±0.73
2.59±1.05
55.8±22.1
1.44±0.42
1.41±4.97
23.5±9.1
448.4±136.6
≥ 41 < 58
42
157.3±62.4
2.15±0.77
2.75±0.96
51.1±16.7
1.56±0.52
1.62±7.95
21.1±8.0
420.4±144.1
≥ 58 < 68
36
149.2±57.8
1.91±0.66
2.53±0.95
59.5±21.0
1.72±0.59
1.62±6.25
24.8±9.0
427.2±144.3
≥ 68
29
133.5±44.4
1.94±0.55
2.59±0.80
55.6±17.4
1.80±0.44
1.64±5.69
19.6±7.2
367.8±110.9
Women
89
138.7±56.9
2.08±0.78
2.78±1.07
51.3±17.7
1.75±0.55
1.53±6.51
19.6±7.4
372.9±122.6
Men
60
173.9±51.7
2.07±0.56
2.39±0.69
61.4±20.9
1.42±0.37
1.61±6.20
26.3±8.6
481.6±132.1
Hypertensive
54
143.2±55.9
1.87±0.60
2.54±0.88
55.1±18.4
1.65±0.44
1.57±5.98
21.9±8.2
398.5±125.6
Normotensive
95
158.4±57.7
2.19±0.73
2.67±0.98
55.5±20.3
1.59±0.55
1.56±6.63
22.6±8.8
428.7±143.0
eGFR ≤ 60
9
119.0±54.2
1.78±0.61
2.57±1.01
46.0±22.0
1.59±0.32
1.40±5.98
17.3±5.6
340.1±149.2
eGFR > 60
140
155.1±57.0
2.09±0.70
2.62±0.95
56.0±19.4
1.61±0.52
1.57±6.41
22.8±8.6
424.1±134.4
BMI: body mass index, UNa: urinary sodium excretion, UNa-BW: urinary sodium excretion adjusted by body weight, Na/Cr: urinary sodium to creatinine ratio, UK: urinary potassium excretion, K/Cr: urinary potassium to creatinine ratio, eGFR: estimated glomerular filtration rate in mL/min/1.73 m2. ♯Urinary osmolality was calculated excluding participants under diuretics drugs (n=2), as follows: 2[Na(mmol) + K(mmol)] + urea(mg/dL)/2.8. values are for comparisons within each column and represent the results of contrasting two categories (sex, blood pressure status and eGFR) or trend when more than two categories were represented (BMI and age): ;;;.
