Table 4.
Effect of Percentage of IDWG on Predialysis Systolic Blood Pressure in Subgroups of Patients According to Clinical or Laboratory Characteristics
| Variable | Slope Parameter Estimate for %IDWG as Predictor of Systolic Blood Pressure (mm Hg) | P |
|---|---|---|
| Cause of ESRD* | ||
| Diabetes | 0.65 ± 0.41 | 0.002 |
| Other† | 1.20 ± 0.29 | <0.0001 |
| Age (y)‡ | ||
| <48 | 1.50 ± 0.47 | <0.0001 |
| 48-60 | 0.51 ± 0.41 | 0.02 |
| 61-73 | 1.07 ± 0.43 | 0.0001 |
| >73 | 0.81 ± 0.41 | <0.0001 |
| Creatinine (mg/dL)§ | ||
| <7.3 | 0.63 ± 0.37 | 0.001 |
| 7.3-9.09 | 0.95 ± 0.35 | <0.0001 |
| 9.1-11.5 | 1.16 ± 0.33 | <0.0001 |
| >11.5 | 1.19 ± 0.41 | <0.0001 |
Note: Values expressed as number ± 95% confidence interval. To convert creatinine in mg/dL to μmol/L, multiply by 88.4.
Abbreviations: %IDWG, percentage of interdialytic weight gain; ESRD, end-stage renal disease.
Parameter estimates generated from a multivariable model with predialysis systolic blood pressure as the dependent variable and the following predictor variables: percentage of IDWG if diabetes as cause of ESRD, percentage of IDWG if other cause of ESRD, diabetes as cause of ESRD, age, dry weight, black race, Hispanic ethnicity, hypertension, left ventricular hypertrophy, arrhythmia, creatinine level, erythropoietin use, and treatment group.
Includes glomerulonephritis, secondary glomerular nephritis, vasculitis, interstitial nephritis, pyelonephritis, hypertensive nephropathy, neoplasms, cystic disease, and hereditary and congenital disease.
Parameter estimates generated from a multivariable model with predialysis systolic blood pressure as the dependent variable and the following predictor variables: percentage of IDWG if older than 48 years, percentage of IDWG if aged 48 to 60 years, percentage of IDWG if aged 61 to 73 years, percentage of IDWG if older than 73 years, age, diabetes as cause of ESRD, dry weight, black race, Hispanic ethnicity, hypertension, left ventricular hypertrophy, arrhythmia, creatinine, erythropoietin use, and treatment group.
Parameter estimates generated from a multivariable model with predialysis systolic blood pressure as the dependent variable and the following predictor variables: percentage of IDWG if creatinine level less than 7.3 mg/dL, percentage of IDWG if creatinine level 7.3 to 9.09 mg/dL, percentage of IDWG if creatinine level 9.1 to 11.5 mg/dL, percentage of IDWG if creatinine level greater than 11.5 mg/dL, creatinine level, age, diabetes as cause of ESRD, dry weight, black race, Hispanic ethnicity, hypertension, left ventricular hypertrophy, arrhythmia, erythropoietin use, and treatment group.