Correlation between the laboratory tests in all study subjects (n=1,400)
| Pair of laboratory tests | Spearman’s r (95% CI) | |
|---|---|---|
| SAA (mg/L) vs. CRP (mg/L) | 0.8438 (0.8275 to 0.8586) | <0.0001 |
| SAA (mg/L) vs. ESR (mm/hr) | 0.4598 (0.4162 to 0.5013) | <0.0001 |
| SAA (mg/L) vs. WBC count (×103/µL) | 0.2054 (0.1532 to 0.2565) | <0.0001 |
| SAA (mg/L) vs. neutrophil (×103/µL) | 0.3305 (0.2816 to 0.3777) | <0.0001 |
| CRP (mg/L) vs. ESR (mm/hr) | 0.5359 (0.4963 to 0.5732) | <0.0001 |
| WBC count (×103/µL) vs. neutrophil (×103/µL) | 0.9212 (0.9126 to 0.9290) | <0.0001 |
| WBC count (×103/µL) vs. CRP (mg/L) | 0.2330 (0.1813 to 0.2834) | <0.0001 |
| WBC count (×103/µL) vs. ESR (mm/hr) | 0.0847 (0.0309 to 0.1380) | 0.0015 |
| Neutrophil (×103/µL) vs. CRP (mg/L) | 0.3353 (0.2865 to 0.3823) | <0.0001 |
| Neutrophil (×103/µL) vs. ESR (mm/hr) | 0.1280 (0.0746 to 0.1807) | <0.0001 |
Abbreviations: CI, confidence interval; SAA, serum amyloid A; CRP, C-reactive protein; WBC, white blood cells; ESR, erythrocyte sedimentation rate.