Table 2

Specificity for self-reports of colorectal cancer screening procedures

FOBTFlexible sigmoidoscopyColonoscopyColonoscopy or sigmoidoscopy
nSpecificity (%)nSpecificity (%)nSpecificity (%)nSpecificity (%)
Overall6485.9 (77.4–94.4)a9092.2 (86.7–97.7)9596.8 (93.3–100)8792.0 (86.3–97.7)
Family history
+FDR1100.03100.05 80.0366.7
−FDR63 85.787 92.090 97.884 92.9
(0.271)b(0.448)(0.317)(0.304)
Gender
Female3884.258 98.362 98.456 98.2
Male26 88.532 81.333 93.931 80.7
(0.631)(0.004) (0.23) (.004)
Ethnicity
White51 86.369 92.874 96.067 92.5
Non-white13 84.621 90.521100.020 90.0
(0.881)(0.928)(0.364)(0.712)
Age
40–4931 93.637 97.338100.036100.0
50–6520 85.036 88.938 97.435 88.6
>6513 69.217 88.219 89.516 81.3
(0.087)(0.347)(0.101)(0.018)
  • a 95% confidence intervals for specificity.

  • b Ps.