Table 3.

ORs and 95% CIs for bladder cancer associated with family history of cancer, stratified by selected characteristics of the individuals

CharacteristicsCases, n (%)*Controls, n (%)*OR (95% CI)
Age (y)
    ≤4527/51 (52.9)18/61 (29.5)2.67 (1.10-6.50)
    >45437/1,107 (39.5)418/1,183 (35.3)1.27 (1.06-1.52)
Gender
    Male396/1,012 (39.1)376/1,080 (34.8)1.31 (1.07-1.59)
    Female68/146 (46.6)60/164 (36.6)1.64 (0.99-2.72)
Smoking status
    Never67/160 (41.9)146/363 (40.2)1.17 (0.78-1.78)
    Ever397/998 (39.8)290/880 (33.0)1.36 (1.11-1.65)
Previous history of cancer
    No441/1,115 (39.6)397/1,173 (33.8)1.35 (1.12-1.63)
    Yes21/41 (51.2)37/67 (55.2)1.83 (0.58-5.78)
  • * Percentage of respondents with this characteristic and a positive family history of cancer.

  • After adjustment by unconditional logistic regression for age, gender, area, and average lifetime trihalomethane levels (μg/L), and smoking status of the subjects when appropriate. Subjects having no first-degree relative diagnosed of cancer were taken as the reference category for al comparisons.