Table 3. Linear regression coefficients and Pearson correlation of RDW with various laboratory data.
| Linear regression coefficients (95% CI) | Pearson correlation | p-value | |
|---|---|---|---|
| Albumin (per 10-g/L increment) | −0.646 (−1.15, −0.14) | −0.196 | 0.013* |
| Ferritin (per 100-ng/mL increment) | 0.026 (−0.04, 0.09) | 0.047 | 0.458 |
| WBC (per 10^9-cells/L increment) | −0.02 (−0.12, 0.08) | −0.026 | 0.682 |
| Hemoglobin (per 10-g/L increment) | −0.368 (−0.54, −0.2) | −0.251 | <0.001* |
| Iron saturation (per 1% increment) | −0.398 (−1.94, 1.14) | −0.030 | 0.613 |
| iPTH (per 100- pmol/L increment) | −0.999 (−1.6965, −0.377) | −0.185 | 0.003* |
| BMI (per 1-kg/m2 increment) | −0.071 (−0.12, −0.02) | −0.151 | 0.009* |
| Creatinine (per 100-μmol/L increment) | −0.087 (−0.192, 0.011) | −0.117 | 0.087 |
| Calcium (per 1-mmol/L increment) | −0.656 (−1.76, 0.44) | −0.066 | 0.244 |
| ALP (per 1-μkat/L increment) | 0 (−16.47, 16.47) | 0.000 | 0.999 |
| BUN (per 1-mmol/L increment) | 1.896 (−1.064, 4.845) | 0.081 | 0.209 |
| Cholesterol (per 1-mmol/L increment) | −0.196 (−0.366, −0.027) | −0.130 | 0.024* |
| GPT (per 1-μkat/L increment) | 0.235 (−38.82, 88.23) | 0.041 | 0.447 |
| Phosphorus (per 1-mmol/L increment) | 0.482 (−0.185, 1.145) | 0.108 | 0.156 |
| Triglyceride (per 100-mmol/L increment) | −4.69 (−33.63, 23.89) | −0.019 | 0.749 |
Abbreviations: BMI, body mass index; GPT, glutamic-pyruvic transaminase; WBC, white blood cell count; PTH, parathyroid hormone; ALP, alkaline phosphate; BUN, blood urea nitrogen; RDW, red cell distribution width.
*p < 0.05.