Summary statistics per patient-year by hydroxyurea use (current)
| Variable . | n . | Hydroxyurea use this year (n = 6308) . | No hydroxyurea use this year (n = 5554) . | P value∗ . |
|---|---|---|---|---|
| Age (years) | 11 925 | 9.9 (4.5) | 6.5 (5.2) | <0.001 |
| Sex | 11 924 | <0.001 | ||
| Female | 3089 (49%) | 3013 (54%) | ||
| Male | 3219 (51%) | 2540 (46%) | ||
| MCV (fL) | 9744 | 95.1 (12.2) | 83.2 (8.9) | <0.001 |
| Hgb (g/dL) | 9738 | 9.1 (1.2) | 9.0 (1.3) | <0.001 |
| ANC (103/μL) | 9655 | 4.5 (1.9) | 4.8 (2.4) | <0.001 |
| ED visits per year | 11 925 | 1.1 (1.9) | 1.1 (1.7) | 0.2 |
| Hospital days per year | 11 925 | 3.8 (5.7) | 2.8 (4.4) | <0.001 |
| Adherence hydroxyurea | 4790 | 2516 (53%) | NA | NA |
| Variable . | n . | Hydroxyurea use this year (n = 6308) . | No hydroxyurea use this year (n = 5554) . | P value∗ . |
|---|---|---|---|---|
| Age (years) | 11 925 | 9.9 (4.5) | 6.5 (5.2) | <0.001 |
| Sex | 11 924 | <0.001 | ||
| Female | 3089 (49%) | 3013 (54%) | ||
| Male | 3219 (51%) | 2540 (46%) | ||
| MCV (fL) | 9744 | 95.1 (12.2) | 83.2 (8.9) | <0.001 |
| Hgb (g/dL) | 9738 | 9.1 (1.2) | 9.0 (1.3) | <0.001 |
| ANC (103/μL) | 9655 | 4.5 (1.9) | 4.8 (2.4) | <0.001 |
| ED visits per year | 11 925 | 1.1 (1.9) | 1.1 (1.7) | 0.2 |
| Hospital days per year | 11 925 | 3.8 (5.7) | 2.8 (4.4) | <0.001 |
| Adherence hydroxyurea | 4790 | 2516 (53%) | NA | NA |
Unit of analysis for this table is individual person-year, where year is by age.
Mean (standard deviation [sd]) for continuous variables; N (%) for categorical variables.
ANC, absolute neutrophil count; ED, emergency department; Hgb, hemoglobin; MCV, mean corpuscular volume.
Wilcoxon rank sum test; Pearson's Chi-squared test; Fisher's exact test.