Table 1.

Study population characteristics for patients with primary breast and colorectal cancer

Breast cancer
Colorectal cancer
HMO (n = 21,336)FFS (n = 109,000)PHMO (n = 16,343)FFS (n = 89,047)P
Age (mean + SD)74.5 ± 6.574.9 ± 7.3<0.0176.4 ± 7.076.9 ± 7.6<0.01
Gender
    Malen/an/a7,790 (47.7)40,253 (45.2)<0.01
    Female21,336 (100%)109,900 (100%)8,553 (52.3)48,794 (54.8)
Race (%)
    White17,718 (83.4)95,762 (88.5)<0.0112,786 (78.8)75,468 (85.7)<0.01
    Black1,423 (6.7)6,881 (6.4)1,355 (8.4)6,924 (7.9)
    Hispanic450 (2.1)1,127 (1.0)324 (2.0)750 (0.9)
    Other1,653 (7.8)4,428 (4.1)1,760 (10.8)4,890 (5.5)
Census tract median income
    <$20,0001,062 (5.1)8,996 (8.7)<0.01988 (6.2)8,678 (10.4)<0.01
    ≥$20,00019,887 (94.9)94,462 (91.3)14,986 (93.8)75,175 (89.6)
Census tract % of some college
    <3014,112 (67.4)72,520 (70.2)<0.0111,134 (69.8)61,975 (74.0)<0.01
    ≥306,827 (32.6)30,829 (29.8)4,829 (30.2)21,776 (26.0)
Marital status
    Married9,651 (46.6)44,781 (42.4)<0.017,054 (44.7)42,554 (49.3)<0.01
    Other11,053 (53.4)60786 (57.6)8,734 (55.3)43,812 (50.7)
Stage at diagnosis
    In situ2,489 (13.1)10,515 (10.8)<0.01770 (5.6)4,254 (5.5)<0.01
    Local11,958 (62.9)58,176 (59.5)5,252 (38.0)28,549 (36.7)
    Regional3,765 (19.8)23,460 (24.0)5,312 (38.4)29,712 (38.2)
    Distant787 (4.2)5,670 (5.7)2,503 (18.0)15,201 (19.6)
  • NOTE: Column totals may not add up due to missing data.