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Table 2 Observed frequencies in the screening study for colorectal cancers in 5727 individuals aged 40–59 years [6]

From: A two-stage Bayesian method for estimating accuracy and disease prevalence for two dependent dichotomous screening tests when the status of individuals who are negative on both tests is unverified

 

Stage one

 

Stage two

T1+

T1-

Total

D+

D-

Total

T2+

39

91

130

SI+

29

338

367

T2-

237

5360

5597

SI-

[a01]

[a00]

5360

Total

276

5451

5727

Total

[a .1]

[a .0]

5727

  1. Note: T1, rehydrated Hemoccult; T2, RPHA-Hemeselect; SI, simultaneous testing; [] indicates that the frequencies are unavailable.