Table 1

Percentage of men who reported a perceived risk scale score ≥3 at baseline (cross-sectional analyses) and at year 2 of follow-up (prospective analyses) by personal history of colorectal polyps and background characteristics measured at baseline

Independent variablesMen with a history of polyps (n = 612)Men without a history of polyps (n = 1343)
naBaselineYear 2 follow-upnaBaselineYear 2 follow-up
Intervention group
Intervention24952.241.467620.416.3
Control36352.143.566721.014.5
Age (yr)
<505863.858.640021.818.0
50–5916955.045.038322.217.0
≥6038549.1b39.2b56018.912.5b
Education (yr)
<127251.440.311916.817.7
1217946.439.142520.713.7
>1236055.0b45.078721.215.9
Married
Yes55351.942.9121220.815.8
No5954.240.712719.711.8
Retired
Yes43350.840.267320.714.3
No17955.348.6b67020.816.6b
Family history of CRC or polypsc
Yes20360.653.732728.822.9
No40947.9b37.2b101618.1b13.0b
Screened within 2 years prior to baseline
Yes53453.044.0103023.317.1
No7846.2b33.3b31312.1b9.9b
Exam status between baseline and year 2
No exams8134.63329.3
Normal exam35135.393115.2
Abnormal exam(s)18060.6b8043.8b
Current smoker
Yes11856.845.818227.520.3
No49050.8b41.8115919.7b14.7b
  • a Varies from the subgroup totals because of missing values on some of the independent variables.

  • b P < 0.2, chosen to identify possible variables for inclusion in the multivariable model. Test statistics were computed to compare the distribution of each independent variable for those at high and low perceived risk within the specified subgroup. P were based on χ2 tests, adjusted for clustering within worksites using SUDAAN (34) .

  • c CRC, colorectal cancer.