Table 1.
Comparison of Bone Marrow Biopsy and Aspirate Quality Between IH, CR, and PR Cohorts
| Characteristic | IH | CR | PR |
P value |
|||
|---|---|---|---|---|---|---|---|
| Overall | IH vs CR | IH vs PR | CR vs PR | ||||
| Biopsy | |||||||
| Total No. of biopsies | 596 | 274 | 298 | ||||
| Length (mm), median | 16.0 | 10.0 | 7.0 | <.001 | <.001 | <.001 | .006 |
| Length of ≥15 mm (%) | 61.4 | 26.6 | 19.1 | <.001 | <.001 | <.001 | .03 |
| Length of ≤5 mm (%) | 4.5 | 28.8 | 50.9 | <.001 | <.001 | <.001 | .04 |
| Aspirate | |||||||
| Total No. of aspirates | 600 | 279 | 294 | <.001 | <.001 | <.001 | .42 |
| With spicules (%) | 93.0 | 71.3 | 73.5 | ||||
| With marrow elements but no spicules (%) | 6.5 | 28.0 | 24.8 | ||||
| With blood only (%) | 0.5 | 0.7 | 1.7 | ||||
CR = clinically referred; IH = in-house; PR = pathologist referred.