Mean, standard deviation, and 95% range of measurements of haemoglobin A2 percentage in 73 patients with sickle cell trait when measured by HPLC, MC, and scanning densitometry
| Method | Mean (SD) | 95% range |
|---|---|---|
| HPLC, high performance liquid chromatography; MC, microcolumn chromatography. | ||
| HPLC | 4.4% (0.34) | 3.7−5.1% |
| MC | 3.3% (0.36) | 2.6−4.0% |
| Scanning densitometry | 3.6% (0.70) | 2.2−5.0% |