Table 2.
Area under the ROC curve for multiple measurements of urinary Na/K ratios to predict home hypertension
| Area under the ROC curve (95% CI)a | |||
|---|---|---|---|
| Overall | Under treatment | Without treatment | |
| (n = 3,273) | (n = 841) | (n = 2432) | |
| Measurement day | |||
| 1 | 0.777 (0.762–0.793) | 0.597 (0.558–0.635) | 0.739 (0.717–0.761) |
| 2 | 0.778 (0.763–0.794) | 0.599 (0.561–0.637) | 0.740 (0.718–0.761) |
| 3 | 0.778 (0.762–0.794) | 0.604 (0.565–0.642) | 0.741 (0.719–0.762) |
| 4 | 0.778 (0.763–0.794) | 0.600 (0.562–0.639) | 0.741 (0.720–0.763) |
| 5 | 0.779 (0.763–0.794) | 0.603 (0.565–0.642) | 0.741 (0.720–0.763) |
| 6 | 0.779 (0.763–0.794) | 0.606 (0.567–0.644) | 0.742 (0.721–0.764) |
| 7 | 0.779 (0.763–0.795) | 0.603 (0.565–0.642) | 0.743 (0.722–0.765) |
| 8 | 0.779 (0.763–0.795) | 0.600 (0.562–0.639) | 0.743 (0.721–0.764) |
| 9 | 0.779 (0.763–0.794) | 0.603 (0.565–0.641) | 0.742 (0.720–0.763) |
| 10 | 0.779 (0.764–0.795) | 0.604 (0.566–0.643) | 0.743 (0.722–0.765) |
Na/K sodium potassium ratio, CI confidence interval, ROC receiver operating characteristic curve
aAdjusted for age (continuous variable), sex, BMI (continuous variable), and drinking status (<23 g/day, ≥23 g/day, ex-drinker, never-drinker)