Table 2.
Salt intake and taste threshold.
| Total | Normotensive subjects | Hypertensive subjects | P value¶ | ||||
|---|---|---|---|---|---|---|---|
| Mean (SD)* |
Median (IQR)† |
Mean (SD) | Median (IQR) | Mean (SD) | Median (IQR) | ||
| Detection threshold (mol/L) |
0.011 (0.016) | 0.008 (0.008) | 0.008 (0.009) | 0.004 (0.004) | 0.015 (0.002) | 0.008 (0.009) | 0.001 |
| Recognition threshold (mol/L) |
0.020 (0.031) | 0.008 (0.012) | 0.013 (0.017) | 0.008 (0.008) | 0.027 (0.016) | 0.016 (0.240) | <0.001 |
| Self-report methods | |||||||
| FFQ (g salt/day)‡ | 1.8 (1.8) | 1.3 (1.6) | 2.2 (1.9) | 1.6 (2.1) | 1.5 (1.6) | 0.9 (1.4) | 0.010 |
| Discretionary salt (g salt/day) | 6.3 (5.4) | 5.4 (5.4) | 4.3 (2.8) | 4.0 (4.8) | 8.2 (6.4) | 6.3 (5.9) | <0.001 |
| 24 h recall (g salt/day) | 2.9 (1.6) | 2.7 (2.2) | 3.4 (1.7) | 3.1 (3.6) | 2.4 (1.4) | 2.1 (1.7) | 0.002 |
| Total intake (g salt/day)** | 10.8 (5.0) | 9.7 (4.7) | 9.6 (3.1) | 9.5 (3.9) | 12.1 (6.2) | 10.5 (4.9) | 0.046 |
| 24-hour urinary sodium excretion§ | |||||||
| mEq/24 h | 177.1 (65.8) | 170.5 (71.5) | 188.5 (73.6) | 175.1 (73.4) | 165.7 (55.4) | 169.0 (63.0) | 0.175 |
| Converted to g salt/day | 10.3 (3.8) | 9.9 (4.2) | 9.8 (4.5) | 9.8 (3.6) | 10.9 (4.3) | 10.1 (4.3) | 0.175 |
∗SD: standard deviation; †IQR: interquartile range; ¶Mann-Whitney test; §Missing: 3 normotensive and 3 hypertensive subjects; ‡FFQ: food frequency questionnaire. **Total intake: sum of FFQ, discretionary salt, and 24-h recall.