Table 1.

Characteristics of diabetes mellitus patients, population-based case control study of pancreatic cancer, San Francisco Bay Area, California

CharacteristicDiabetics with pancreatic cancer (n = 68)Diabetics without pancreatic cancer (n = 150)P
Sex
    Men40 (59%)91 (61%)
    Women28 (41%)59 (39%)0.80
Race
    White47 (69%)128 (85%)
    Black14 (21%)10 (7%)
    Asian/Pacific Islander/other7 (10%)12 (8%)0.007
Body-mass index, kg/m2 (range)
    Mean ± SD27.7 ± 4.527.3 ± 4.60.52
    Quartile 1 (≤22.1)3 (4%)20 (13%)
    Quartile 2 (22.2-24.2)14 (21%)21 (14%)
    Quartile 3 (24.3-26.5)16 (24%)30 (20%)
    Quartile 4 (≥26.6)35 (51%)79 (53%)0.17
Diabetes duration, y
    Mean ± SD7.6 ± 5.612.1 ± 9.40.0003
Diabetes diagnosis age, y
    Mean ± SD60.4 ± 10.157.0 ± 12.50.05
    ≥50 y old at diagnosis58 (85%)110 (73%)0.05
Insulin use
    Yes39 (57%)53 (35%)0.002
        Years of use (mean ± SD)2.9 ± 4.19.2 ± 7.5<0.0001
Years between diabetes diagnosis and initial use of insulin (mean ± SD)4.2 ± 5.25.7 ± 6.20.23
Family history of diabetes25 (38%)53 (36%)0.83