Table 4.
Logistic regression models comparing attainment of various laboratory standards between ethnic groups
| Logistic Regression models,a Odds ratio (95% CI)
|
||||
|---|---|---|---|---|
| Step 1 unadjusted | Step 2 + patient factorsb | Step 3 + area- level social deprivation | Step 4 + center effect | |
| Hemoglobin ≥ 10 g/dl | ||||
| White | Reference | Reference | Reference | Reference |
| South Asian | 0.96 (0.81 − 1.14) | 1.05 (0.88 − 1.24) | 1.07 (0.90 − 1.28) | 1.02 (0.84 − 1.23) |
| Black | 0.62 (0.50 − 0.76) | 0.66 (0.53 − 0.83) | 0.68 (0.55 − 0.85) | 0.57 (0.45 − 0.71) |
| p value | 0.0001 | 0.001 | 0.002 | <0.0001 |
| URR > 65% | ||||
| White | Reference | Reference | Reference | Reference |
| South Asian | 1.36 (1.13 − 1.63) | 1.57 (1.29 − 1.90) | 1.57 (1.30 − 1.91) | 1.78 (1.31 − 2.41) |
| Black | 0.81 (0.63 − 1.03) | 0.84 (0.65 − 1.09) | 0.85 (0.65 − 1.09) | 0.84 (0.62 − 1.13) |
| p value | 0.0005 | <0.0001 | <0.0001 | 0.0009 |
| Phosphate < 5.6 mg/dl | ||||
| White | Reference | Reference | Reference | Reference |
| South Asian | 1.20 (1.05 − 1.37) | 1.38 (1.20 − 1.58) | 1.35 (1.18 − 1.55) | 1.26 (1.06 − 1.49) |
| Black | 1.60 (1.31 − 1.94) | 1.90 (1.55 −2.32) | 1.83 (1.49 − 2.24) | 1.62 (1.31 − 2.00) |
| p value | <0.0001 | <0.0001 | < 0.0001 | <0.0001 |
| Calcium 8.8–10.4 mg/dl | ||||
| White | Reference | Reference | Reference | Reference |
| South Asian | 0.77 (0.67 − 0.88) | 0.79 (0.69 − 0.91) | 0.78 (0.67 − 0.89) | 0.77 (0.65 − 0.90) |
| Black | 1.14 (0.92 − 1.40) | 1.15 (0.93 − 1.42) | 1.11 (0.90 − 1.38) | 1.05 (0.82 − 1.35) |
| p value | 0.0003 | 0.001 | 0.001 | 0.001 |
| CaPo4 < 55 mg2/dl2 | ||||
| White | Reference | Reference | Reference | Reference |
| South Asian | 1.27 (1.11 − 1.46) | 1.44 (1.25 − 1.66) | 1.39 (1.21 − 1.60) | 1.26 (1.08 − 1.47) |
| Black | 1.79 (1.46 −2.19) | 2.11 (1.71 −2.60) | 1.99 (1.61 − 2.45) | 1.71 (1.40 − 2.09) |
| p value | <0.0001 | <0.0001 | 0.001 | <0.0001 |
| PTH < 300 pg/ml | ||||
| White | Reference | Reference | Reference | Reference |
| South Asian | 0.58 (0.50 − 0.68) | 0.59 (0.50 − 0.69) | 0.60 (0.51 − 0.70) | 0.62 (0.54 − 0.72) |
| Black | 0.30 (0.24 − 0.36) | 0.30 (0.25 − 0.38) | 0.32 (0.25 − 0.39) | 0.27 (0.22 − 0.33) |
| p value | <0.0001 | <0.0001 | <0.0001 | <0.0001 |
a
Separate models were constructed for each of the standards. Covariates were sequentially added to the model from step 1 to step 4.
b
Covariates adjusted: age, sex, cause of end stage renal disease, year of start of RRT, RRT modality.
RRT, renal replacement therapy; PTH, parathyroid hormone; URR, Urea reduction ratio; CaPo4, calcium phosphate product.