Table 2.
Sodium (Na), potassium (K), and sodium to potassium ratio (Na/K ratio) in 24-h urine by age groups in men and women participating in the seventh wave of the Tromsø Study (n = 493), mean and standard deviation.
| N | Na (mmol/24-h) 1 | K (mmol/24-h) 2 | Na/K Ratio | Calculated NaCl (g/24-h) | |
|---|---|---|---|---|---|
| Men | |||||
| 40–54 years | 90 | 181.2 (71.0) | 97.5 (29.5) | 1.96 (0.81) | 10.6 (4.2) |
| 55–69 years | 151 | 176.0 (69.1) | 100.2 (27.7) | 1.80 (0.63) | 10.3 (4.0) |
| p-value | 0.58 | 0.49 | 0.11 | 0.58 | |
| Women | |||||
| 40–54 years | 112 | 137.3 (42.1) | 74.3 (24.0) | 1.97 (0.73) | 8.0 (2.5) |
| 55–69 years | 140 | 123.0 (50.3) | 77.8 (25.0) | 1.65 (0.62) | 7.2 (2.9) |
| p-value | 0.02 | 0.26 | <0.001 | 0.02 | |
1 To convert Na from mmol to gram, multiply by 0.023, 2 To convert K from mmol to gram, multiply by 0.039.