Table 2. B-type natriuretic peptide levels in patients with and without renal function improvement during follow up.
| BNP levels | All patients | Improvement in renal function | No improvement in renal function | P value |
|---|---|---|---|---|
| Overall cohort | [n=127] | [n=42] | [n=73] | |
| BNP pre-intervention (pg/mL) | 97 [35, 254] | 103 [48, 366] | 95 [31, 193] | 0.10 |
| BNP 1 day post-intervention (pg/mL) | 63 [24, 179]* | 87 [35, 217]* | 55 [22, 144]† | 0.15 |
| %BNP decrease | −31 [−57, 6] | −35 [−55, −1] | −29 [−52, 15] | 0.33 |
| BNP 6 months post-intervention (pg/mL) | 75 [31, 190]† | 114 [41, 181]† | 60 [23, 103] | 0.47 |
| Patients with baseline eGFR <60 mL/min/1.73 m2 | [n=56] | [n=27] | [n=22] | |
| BNP pre-intervention (pg/mL) | 164 [65, 352] | 168 [60, 399] | 182 [93, 362] | 0.82 |
| BNP 1 day post-intervention (pg/mL) | 118 [50, 238]† | 124 [48, 235]† | 139 [59, 411] | 0.47 |
| %BNP decrease | −26 [−59,10] | −30 [−60, 0] | 1 [−50, 23] | 0.12 |
| BNP 6 months post-intervention (pg/mL) | 125 [62, 194]† | 125 [46, 181]† | 169 [87, 361] | 0.18 |
*, P<0.001 compared with BNP pre-intervention; †, P<0.05 compared with BNP pre-intervention. BNP, B-type natriuretic peptide; BP, blood pressure; LVEF, left ventricular ejection fraction; RAS, renal artery stenosis. Data are expressed as median [25th and 75th percentiles), or number [percentage) of patients.