Table I.

Demographic, SES, and length-of-stay characteristics of the PHIS ALL cohort, 1999–2009

Patient characteristic	N (%)
Age at diagnosis, median 5.7 years, range 0 – 19 years*
<1 year	243 (2.9)
1 – <10 years	6,029 (70.8)
10 – <19 years	2,244 (26.4)
Female	3,739 (43.9)
Race
White	6,506 (76.4)
Black	634 (7.4)
Asian/Pacific Islander	264 (3.1)
Native American	63 (0.7)
Other	625 (7.3)
Unknown	424 (5.0)
Down syndrome	200 (2.4)
Insurance
Private	3,334 (39.2)
Government	3,130 (36.8)
Self-pay	244 (2.9)
Other	1,775 (20.8)
Unknown	33 (0.4)
Anthracycline and dexamethasone exposure
Both	1,045 (12.3)
Dexamethasone only	3,886 (45.6)
Anthracycline only	2,958 (34.7)
Neither	627 (7.4)
Income estimate	Median (Range)
Median household income by patients’ home ZIP codes**	$42,224 (10,395 –192,641)
Hospitalization data	Median (Range)
Number of hospital days	9 (1–60)***
Proportion of study days in the hospital	0.31 (0.03–1)
Number of admissions	1 (1–6)

^*Only patients up to age 19 years were included.

^**ZIP code data were missing for 1428 (16.8%) patients.

^***Patients who remained inpatient beyond day 29 without evidence of consolidation chemotherapy were censored at day 60.