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Table 1.

Baseline characteristics of the colorectal cancer cases and matched controls

Cases (n = 173)Controls (n = 313)
Age at blood draw (y), mean (±SD) 69.5 (±8.3) 69.2 (±8.2) 
Hours of fasting before blood draw, mean (±SD) 12.4 (±3.6) 12.5 (±3.3) 
Male, n (%) 106 (61) 187 (60) 
Ethnicity, n (%)   
    Japanese American 70 (40) 132 (42) 
    African American 32 (19) 55 (18) 
    Latino 34 (20) 59 (19) 
    White 26 (15) 47 (15) 
    Native Hawaiian 11 (6) 20 (6) 
Education, n (%)*   
    High school graduate or less 67 (39) 110 (35) 
    Some postsecondary education 54 (31) 96 (31) 
    College graduate 51 (30) 104 (34) 
Had previous colonoscopy, n (%)* 62 (36) 142 (45) 
1° family history of colorectal cancer, n (%) 21 (10) 29 (8) 
Body mass index (kg/m2), n (%)*   
    <25.0 70 (40) 141 (45) 
    25.0-30.0 67 (39) 130 (42) 
    ≥30.0 36 (21) 42 (13) 
Smoking history (y), n (%)*   
    None 68 (40) 143 (47) 
    <10 35 (21) 60 (30) 
    10-<20 38 (22) 51 (17) 
    ≥20 29 (17) 48 (16) 
Ethanol (g/d), n (%)*   
    0 77 (45) 159 (51) 
    <8 45 (26) 85 (27) 
    ≥8 51 (29) 69 (22) 
Moderate or vigorous physical activity (h/wk), mean (±SD)* 1.29 (±1.52) 1.19 (±1.27) 
Dietary variables, as density = g/kcal/d, mean (± SD)*   
    Total vegetables 162.8 (±92.2) 167.1 (±83.2) 
    Cruciferous vegetables 24.3 (±25.5) 26.2 (±22.6) 
    Total fruit 170.2 (±134.2) 184.7 (±147.2) 
    Dietary fiber 11.5 (±4.6) 12.1 (±4.5) 
    Folate 175.3 (±75.1) 189.1 (±86.4) 
    Calcium 341.3 (±113.3) 367.2 (±138.1) 
    Processed meat 8.0 (±5.8) 7.4 (±6.4) 
    Red meat, not including processed meat 22.2 (±14.2) 18.7 (±12.0) 
Cases (n = 173)Controls (n = 313)
Age at blood draw (y), mean (±SD) 69.5 (±8.3) 69.2 (±8.2) 
Hours of fasting before blood draw, mean (±SD) 12.4 (±3.6) 12.5 (±3.3) 
Male, n (%) 106 (61) 187 (60) 
Ethnicity, n (%)   
    Japanese American 70 (40) 132 (42) 
    African American 32 (19) 55 (18) 
    Latino 34 (20) 59 (19) 
    White 26 (15) 47 (15) 
    Native Hawaiian 11 (6) 20 (6) 
Education, n (%)*   
    High school graduate or less 67 (39) 110 (35) 
    Some postsecondary education 54 (31) 96 (31) 
    College graduate 51 (30) 104 (34) 
Had previous colonoscopy, n (%)* 62 (36) 142 (45) 
1° family history of colorectal cancer, n (%) 21 (10) 29 (8) 
Body mass index (kg/m2), n (%)*   
    <25.0 70 (40) 141 (45) 
    25.0-30.0 67 (39) 130 (42) 
    ≥30.0 36 (21) 42 (13) 
Smoking history (y), n (%)*   
    None 68 (40) 143 (47) 
    <10 35 (21) 60 (30) 
    10-<20 38 (22) 51 (17) 
    ≥20 29 (17) 48 (16) 
Ethanol (g/d), n (%)*   
    0 77 (45) 159 (51) 
    <8 45 (26) 85 (27) 
    ≥8 51 (29) 69 (22) 
Moderate or vigorous physical activity (h/wk), mean (±SD)* 1.29 (±1.52) 1.19 (±1.27) 
Dietary variables, as density = g/kcal/d, mean (± SD)*   
    Total vegetables 162.8 (±92.2) 167.1 (±83.2) 
    Cruciferous vegetables 24.3 (±25.5) 26.2 (±22.6) 
    Total fruit 170.2 (±134.2) 184.7 (±147.2) 
    Dietary fiber 11.5 (±4.6) 12.1 (±4.5) 
    Folate 175.3 (±75.1) 189.1 (±86.4) 
    Calcium 341.3 (±113.3) 367.2 (±138.1) 
    Processed meat 8.0 (±5.8) 7.4 (±6.4) 
    Red meat, not including processed meat 22.2 (±14.2) 18.7 (±12.0) 
*

Totals do not always sum to 173 and 313 because of missing values.

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