Table 3 Age, sex and educational levela as predictors of sodium and potassium excretion, in multiple linear regression
| Â | Beta (95% CIs) | P value |
|---|---|---|
Sodium (mg per day) | ||
 Age (years) | −7.4 (−26.3, 11.4) | 0.431 |
 Sex (male vs. female) | 428.0 (91.3, 764.6) | 0.014 |
 Education (tertiary vs. less than) | −24.7 (− 394.1, 344.7) | 0.893 |
Potassium (mg per day) | ||
 Age (years) | 13.3 (5.3, 21.3) | 0.002 |
 Sex (male vs. female) | 162.3 (−11.8, 336.4) | 0.067 |
 Education (tertiary vs. less than) | 183.5 (24.9, 342.1) | 0.024 |
Sodium-to-potassium ratio | ||
 Age (years) | −0.032 (− 0.052, − 0.012) | 0.002 |
 Sex (male vs. female) | 0.331 (− 0.019, 0.682) | 0.063 |
 Education (tertiary vs. less than) | −0.427 (− 0.832, − 0.022) | 0.039 |