Table 2.

Posttest probability of microbiome-based adenoma screen

Age at diagnosis (years)Incidence rate (per 100,000 people)aPretest probabilityPretest oddsPosttest oddsbPosttest probability95% CI for posttest probability
35–398.20.00010.0000820.00580.00580.0045–0.0074
40–4415.80.00020.0001580.01120.01110.0092–0.0133
45–4929.10.00030.0002910.02070.02030.0177–0.0232
50–5455.80.00060.0005580.03960.03810.0345–0.0420
55–5977.00.00080.0007710.05470.05190.0477–0.0564
60–64112.00.00110.0011220.07960.07380.0688–0.0790
65–69168.00.00170.0016830.11950.10670.1008–0.1129
70–74223.40.00220.0022390.15900.13720.1306–0.1440
75–79283.30.00280.0028410.20170.16780.1606–0.1752
80–84337.10.00340.0033820.24010.19360.1859–0.2014
85+376.40.00380.0037780.26820.21150.2036–0.2196
  • aBased on SEER data, years 2000 to 2010.

  • bLikelihood ratio of a positive test = 71.