Table 3

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 plant 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
Plant characteristics
CRCb offered all year
Yes28151.642.446319.914.9
No33152.642.988021.115.7
CRC offered at worksite
Yes40350.140.271019.914.7
No20956.0c47.4c63321.616.3
FOBTs distributed by mail
Yes44452.341.984020.415.2
No16851.844.650321.315.7
Plant notified employees that FOBT was due
Yes43754.044.288419.614.8
No17547.4c38.945922.916.6
Plant notified employee that DRE and FS were due
Yes37453.744.769820.615.3
No23849.639.564520.815.5
  • a Varies from the subgroup totals because of missing values on some of the independent variables.

  • b CRC, colorectal cancer; DRE, digital rectal examination; FS, flexible sigmoidoscopy examination.

  • c 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) .