Table 1.
Baseline Characteristics of the 369 Patients
| Low U‐SALT (n=277) | High U‐SALT (n=92) | P Value | |
|---|---|---|---|
| Age, y | 67.0±15.7 | 69.2±13.3 | .22 |
| Female sex, No. (%) | 168 (60.6) | 41 (44.6) | .005 |
| Body mass index, kg/m2 | 23.3±3.8 | 25.4±4.1 | <.001 |
| Current smokers, No. (%) | 29 (10.5) | 10 (10.9) | .52 |
| Clinic systolic BP, mm Hg | 140±22 | 144±24 | .21 |
| Clinic diastolic BP, mm Hg | 77±11 | 79±14 | .16 |
| Clinic pulse rate, bpm | 72±11 | 69±13 | .057 |
| Hypertension, No. (%) | 191 (71.3) | 80 (87.9) | .001 |
| Ischemic heart disease, No. (%) | 28 (10.4) | 7 (7.8) | .31 |
| Stroke, No. (%) | 21 (7.8) | 7 (7.8) | .60 |
| Diabetes mellitus, No. (%) | 22 (9.1) | 15 (18.5) | .021 |
| Dyslipidemia, No. (%) | 111 (47.0) | 46 (59.7) | .035 |
| Antihypertensive medications, No. (%)a | 137 (52.9) | 58 (70.7) | .003 |
| Antihypertensive medications, No.b | 1.7±0.9 | 1.7±0.8 | .85 |
| Calcium channel blockers, No. (%)c | 100 (47.2) | 40 (55.6) | .14 |
| Angiotensin II receptor blockers, No. (%)c | 81 (38.4) | 30 (41.7) | .36 |
| Angiotensin‐converting enzyme inhibitors, No. (%)c | 9 (4.3) | 8 (11.1) | .039 |
| Diuretics, No. (%)c | 29 (17.3) | 6 (10.0) | .13 |
| α‐Blockers, No. (%)c | 10 (4.7) | 7 (9.7) | .11 |
| β‐Blockers, No. (%)c | 21 (10.0) | 8 (11.1) | .47 |
Abbreviations: BP, blood pressure; bpm, beats per minute; U‐SALT, urinary salt excretion. Data are expressed as number (percentage) or mean±standard deviation (SD). aThe percentages in hypertensive patients. bMean±SD of the patients taking antihypertensive medications. cThe percentage of patients among those taking antihypertension medications.