Table 2.
Twenty-four-hour urine collection data.
| Variable | Total n = 727 |
Men n = 260 |
Women n = 467 |
p * |
|---|---|---|---|---|
| Volume, mL | 1613.5 ± 767.5 | 1657.5 ± 782.0 | 1589.1 ± 759.1 | 0.252 |
| Na, mmol/day | 151.32 ± 60.2 | 179.9 ± 65.6 | 135.3 ± 50.4 | <0.001 |
| Na (energy adjusted), mmol/kcal/day | 0.075 ± 0.03 | 0.077 ± 0.037 | 0.074 ± 0.32 | 0.186 |
| K, mmol/day | 50.81 ± 18.1 | 55.62 ± 18.95 | 48.14 ± 17.07 | <0.001 |
| K, mmol/kcal/day | 0.025 ± 0.011 | 0.024 ± 0.011 | 0.026 ± 0.11 | 0.004 |
| Urinary Na/K ratio | 3.15 ± 1.22 | 3.42 ± 1.22 | 3.01 ± 1.19 | <0.001 |
| Na intake (24-hr urine), g/day | 3.49 ± 1.38 | 4.14 ± 1.51 | 3.11 ± 1.16 | <0.001 |
| Na intake (quiestionnaire), g/day | 2.6 ± 0.98 | 2.98 ± 1.16 | 2.38 ± 0.79 | <0.001 |
| Na intake (energy adjusted, 24-h urine), mg/kcal/day | 1.73 ± 0.8 | 1.82 ± 0.87 | 1.7 ± 0.75 | 0.186 |
| Iodine intake, µg/day ** | 286.7 (215.2–370.3) | 327.3 (250.9–430.9) | 261.2 (201.5–334.7) | <0.001 |
| Iodine intake (energy adjusted), µg/kcal/day ** | 0.16 (0.12–0.21) | 0.17 (0.13–0.22) | 0.17 (0.13–0.21) | <0.001 |
* Comparison between sexes. Values are mean ± SD except for iodine intake. ** Iodine intake = Iodine excretion/0.92, K = potassium, Na = sodium; IQR = interquartile range; SD = standard deviation.