Predictors of SF-36 RP score at 1 week
| Explanatory variable7-150 . | Coefficient (β) . | SE . | 95% CI . | t ratio . | P . | VIF . |
|---|---|---|---|---|---|---|
| Intercept | 42.03 | 13.56 | ||||
| Female sex | − 6.77 | 1.32 | − 9.38 to − 4.16 | − 5.10 | < .001 | 1.02 |
| Duration of BMH (min) | − 0.26 | 0.05 | − 0.35 to − 0.17 | − 5.73 | < .001 | 1.02 |
| Pre-BMH RP score | 0.51 | 0.13 | 0.24 to 0.77 | 3.77 | < .001 | 1.00 |
| Explanatory variable7-150 . | Coefficient (β) . | SE . | 95% CI . | t ratio . | P . | VIF . |
|---|---|---|---|---|---|---|
| Intercept | 42.03 | 13.56 | ||||
| Female sex | − 6.77 | 1.32 | − 9.38 to − 4.16 | − 5.10 | < .001 | 1.02 |
| Duration of BMH (min) | − 0.26 | 0.05 | − 0.35 to − 0.17 | − 5.73 | < .001 | 1.02 |
| Pre-BMH RP score | 0.51 | 0.13 | 0.24 to 0.77 | 3.77 | < .001 | 1.00 |
Adjusted R2 = 0.13.
Potential explanatory variables included baseline (pre-BMH) RP score, age, sex, duration of BMH, volume of marrow harvested per unit weight, hemoglobin concentration during the post-BMH hospitalization, and duration of post-BMH hospitalization (≤ 48 hours versus > 48 hours). The volume of marrow harvested/duration of BMH was also entered as an index of “difficulty of harvest.”
Backward stepwise variable selection was used to decide which variables to retain in the model. Explanatory variables were retained in the model when α was less than or equal to 0.10.