Table 1 Baseline demographic, clinical and bioimpedance analysis data
Baseline characteristics | Total (n = 50) | Controlled BP group (n = 17) | Uncontrolled BP group (n = 33) | P-value |
|---|---|---|---|---|
Demographic data | ||||
Age (yr) | 35.8 ± 9.4 | 32.0 ± 8.0 | 37.7 ± 9.5 | 0.04 |
Female sex | 28 (56.0) | 11 (64.7) | 17 (51.5) | 0.37 |
Self-reported ethnicity | ||||
Black | 22 (44.0) | 7 (41.2) | 15 (45.5) | 0.77 |
Mixed ancestry | 28 (56.0) | 10 (58.8) | 18 (54.5) | |
Clinical data | ||||
Diabetes mellitus | 2 (4.0) | 1 (5.9) | 1 (3.0) | 1.00 |
Dialysis vintage (mo) | 21 (8–31) | 31 (12–39) | 15 (7–22) | 0.02 |
Self-reported RKF (≥250 mL/day) | 29 (58.0) | 8 (47.1) | 21 (63.6) | 0.26 |
Mean no. of antihypertensives | 2.7 ± 1.0 | 2.8 ± 1.2 | 2.6 ± 0.9 | 0.54 |
No. of antihypertensives | ||||
0–2 | 23 (46.0) | 9 (52.9) | 14 (42.4) | 0.48 |
≥ 3 | 27 (54.0) | 8 (47.1) | 19 (57.6) | |
Took antihypertensive drugs on day of BIS measurements: yes | 37 (74.0) | 12 (70.6) | 25 (75.8) | 0.74 |
Type of antihypertensive drugs | ||||
Calcium channel blocker | 33 (66.0) | 11 (64.7) | 22 (66.7) | 0.89 |
Angiotensin-converting enzyme inhibitor | 26 (52.0) | 9 (52.9) | 17 (51.5) | 0.76 |
Angiotensin receptor blocker | 9 (18.0) | 3 (17.6) | 6 (18.2) | 1.00 |
Loop diuretic | 38 (76.0) | 12 (70.6) | 26 (78.8) | 0.73 |
Mineralocorticoid receptor antagonist | 1 (2.0) | 0 | 1 (3.0) | – |
Alpha blocker | 9 (18.0) | 4 (23.5) | 5 (15.2) | 0.47 |
Non-selective alpha-1 and beta-receptor blocker | 14 (28.0) | 6 (35.3) | 8 (24.2) | 0.51 |
Cardio-selective beta-1 receptor blocker | 5 (10.0) | 3 (17.6) | 2 (6.0) | 0.32 |
Systolic BP (mmHg) | 138.8 ± 20.8 | 116 ± 14.1 | 150 ± 12.5 | < 0.01 |
Diastolic BP (mmHg) | 91.0 ± 13.9 | 76.5 ± 8.6 | 98.5 ± 9.4 | < 0.01 |
MAP (mmHg) | 106 ± 15.5 | 89.7 ± 9.9 | 115.8 ± 9.0 | < 0.01 |
Weight on the day of data collection (kg) | 65.2 (57.3–72.0) | 66.3 (57.3–72.1) | 63.4 (57.7–75.5) | 0.99 |
Clinically estimated dry weight (kg) | 65.2 (56.7–70.2) | 62.2 (57.9–68.9) | 66.5 (56.7–73.7) | 0.64 |
BMI (kg/m2) | 23.6 (21.6–26.7) | 24.3 (21.6–26.7) | 23.6 (21.7–26.6) | 0.83 |
Bioimpedance measurement | ||||
Dry weight (kg) | 62.7 (55.2–71.3) | 66.0 (55.2–71.1) | 62.0 (56.2–71.4) | 0.91 |
TBW (L) | 34.8 ± 6.7 | 33.0 ± 6.4 | 35.7 ± 6.8 | 0.18 |
ECW (L) | 16.5 ± 3.3 | 15.3 ± 2.9 | 17.1 ± 3.4 | 0.07 |
ECW to TBW | 0.48 ± 0.04 | 0.47 ± 0.04 | 0.48 ± 0.05 | 0.49 |
ICW (L) | 18.2 ± 4.0 | 17.6 ± 3.9 | 18.5 ± 4.1 | 0.43 |
LTI (kg/m2) | 14.1 ± 3.0 | 13.7 ± 2.4 | 14.3 ± 3.3 | 0.51 |
FTI (kg/m2) | 8.9 (6.4–13.0) | 10.5 (8.3–12.8) | 7.7 (5.9–13.3) | 0.27 |