Table 1.

Distribution of select characteristics among study subjects

VariablesBladder cancer
Cases (n = 51)Controls (n = 51)P*
Sex, n (%)
    Male36 (70.59)36 (70.59)
    Female15 (29.41)15 (29.41)1.000
Age, y
    Mean (SD)63.98 (10.41)64.10 (10.41)0.907
Smoking status, n (%)
    Never13 (25.49)24 (47.06)
    Ever38 (74.51)27 (52.94)0.023
Pack-years
    Mean (SD)37.92 (25.96)24.01 (21.23)0.024
  • * P values were derived from the Pearson χ2 test for categorical variables (sex and smoking status) and Student's t test for continuous variables (age and cigarette smoking pack-years). All P values are two sided.

  • In ever smokers only.