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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 ± 6.5 74.9 ± 7.3 <0.01 76.4 ± 7.0 76.9 ± 7.6 <0.01 
Gender       
    Male n/a n/a  7,790 (47.7) 40,253 (45.2) <0.01 
    Female 21,336 (100%) 109,900 (100%)  8,553 (52.3) 48,794 (54.8)  
Race (%)       
    White 17,718 (83.4) 95,762 (88.5) <0.01 12,786 (78.8) 75,468 (85.7) <0.01 
    Black 1,423 (6.7) 6,881 (6.4)  1,355 (8.4) 6,924 (7.9)  
    Hispanic 450 (2.1) 1,127 (1.0)  324 (2.0) 750 (0.9)  
    Other 1,653 (7.8) 4,428 (4.1)  1,760 (10.8) 4,890 (5.5)  
Census tract median income       
    <$20,000 1,062 (5.1) 8,996 (8.7) <0.01 988 (6.2) 8,678 (10.4) <0.01 
    ≥$20,000 19,887 (94.9) 94,462 (91.3)  14,986 (93.8) 75,175 (89.6)  
Census tract % of some college       
    <30 14,112 (67.4) 72,520 (70.2) <0.01 11,134 (69.8) 61,975 (74.0) <0.01 
    ≥30 6,827 (32.6) 30,829 (29.8)  4,829 (30.2) 21,776 (26.0)  
Marital status       
    Married 9,651 (46.6) 44,781 (42.4) <0.01 7,054 (44.7) 42,554 (49.3) <0.01 
    Other 11,053 (53.4) 60786 (57.6)  8,734 (55.3) 43,812 (50.7)  
Stage at diagnosis       
    In situ 2,489 (13.1) 10,515 (10.8) <0.01 770 (5.6) 4,254 (5.5) <0.01 
    Local 11,958 (62.9) 58,176 (59.5)  5,252 (38.0) 28,549 (36.7)  
    Regional 3,765 (19.8) 23,460 (24.0)  5,312 (38.4) 29,712 (38.2)  
    Distant 787 (4.2) 5,670 (5.7)  2,503 (18.0) 15,201 (19.6)  
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 ± 6.5 74.9 ± 7.3 <0.01 76.4 ± 7.0 76.9 ± 7.6 <0.01 
Gender       
    Male n/a n/a  7,790 (47.7) 40,253 (45.2) <0.01 
    Female 21,336 (100%) 109,900 (100%)  8,553 (52.3) 48,794 (54.8)  
Race (%)       
    White 17,718 (83.4) 95,762 (88.5) <0.01 12,786 (78.8) 75,468 (85.7) <0.01 
    Black 1,423 (6.7) 6,881 (6.4)  1,355 (8.4) 6,924 (7.9)  
    Hispanic 450 (2.1) 1,127 (1.0)  324 (2.0) 750 (0.9)  
    Other 1,653 (7.8) 4,428 (4.1)  1,760 (10.8) 4,890 (5.5)  
Census tract median income       
    <$20,000 1,062 (5.1) 8,996 (8.7) <0.01 988 (6.2) 8,678 (10.4) <0.01 
    ≥$20,000 19,887 (94.9) 94,462 (91.3)  14,986 (93.8) 75,175 (89.6)  
Census tract % of some college       
    <30 14,112 (67.4) 72,520 (70.2) <0.01 11,134 (69.8) 61,975 (74.0) <0.01 
    ≥30 6,827 (32.6) 30,829 (29.8)  4,829 (30.2) 21,776 (26.0)  
Marital status       
    Married 9,651 (46.6) 44,781 (42.4) <0.01 7,054 (44.7) 42,554 (49.3) <0.01 
    Other 11,053 (53.4) 60786 (57.6)  8,734 (55.3) 43,812 (50.7)  
Stage at diagnosis       
    In situ 2,489 (13.1) 10,515 (10.8) <0.01 770 (5.6) 4,254 (5.5) <0.01 
    Local 11,958 (62.9) 58,176 (59.5)  5,252 (38.0) 28,549 (36.7)  
    Regional 3,765 (19.8) 23,460 (24.0)  5,312 (38.4) 29,712 (38.2)  
    Distant 787 (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.

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