Table 3. Demographic characteristics of patients in PHIS-assembled cohort compared to the National Cancer Institute’s SEER program.

	PHIS-assembled (n = 1,395*)		SEER 2004–2013 (n = 1,477)		P-value
	Number	%	Number	%
Age category
<1	2	0.14	4	0.27	<0.001
≥1 and <5	182	13.1	170	11.51
≥5 and <10	374	26.8	301	20.38
≥10 and <15	434	31.1	402	27.22
≥15 and <20	403	28.9	600	40.62
Gender
Male	1,058	75.8	1007	68.18	<0.001
Female	337	24.2	470	31.82
Race
White	951	68.2	1131	76.57	0.03
Black	131	9.4	203	13.74
Other**	294	21.1	130	8.8
Unknown**	19	1.4	13	0.9

*14 subjects aged 20–21 in the PHIS-assembled cohort are excluded from all comparisons, as the NCI SEER program does not include this specific age range.

**Other/unknown categories were excluded from this comparison