Table 1. Baseline Demographic and Clinical Characteristics of the Cohort of Pediatric Patients With ALL.
| Characteristic | Patients (N = 2397)a | P value |
|---|---|---|
| Sex | ||
| Female | 1043 (44) | <.001 |
| Male | 1354 (56) | |
| Age at ALL diagnosis, mean (SD), y | ||
| All | 6.1 (4.7) | <.001 |
| Female | 5.8 (4.7) | |
| Male | 6.4 (4.7) | |
| Age group at ALL diagnosis, y | ||
| 0-4 | 1182 (49) | NA |
| 5-10 | 621 (26) | |
| 11-15 | 409 (17) | |
| 16-17 | 185 (8) | |
| Calendar year at ALL diagnosis | ||
| 1988-1991 | 296 (12) | NA |
| 1992-1999 | 646 (27) | |
| 2000-2007 | 640 (27) | |
| 2008-2013 | 499 (21) | |
| Follow-up duration, mean (SD), y | 12.4 (9.0) | NA |
| Inclusion from register | ||
| Swedish Cancer Register and Swedish National Patient Registerb | 2055 (86) | NA |
| Swedish Cancer Register alone | 29 (1) | |
| Swedish National Patient Register aloneb | 313 (13) | |
| Deaths | 409 (17) | NA |
Abbreviations: ALL, acute lymphoblastic leukemia; NA, not applicable.
a
Data are presented as the number (percentage) of patients unless otherwise indicated.
b
Two inpatient visits fulfilling the inclusion criteria were needed to be included from the Swedish Patient Register.