Table 1

Estimated cumulative probabilities (probability that the stage is less than or equal to 0, 1, 2, or 3) for Spigelman stages for patients entering with and without adenomas, and with time from diagnosis to entry dichotomised at 15 years (familial adenomatous polyposis (FAP) time)

No of endoscopiesSpigelman stage+Adenoma FAP time <15 y+Adenoma FAP time >15 y−Adenoma FAP time <15 y−Adenoma FAP time >15 y
100.110.050.760.57
110.380.170.920.84
120.750.560.990.97
130.930.851.000.99
200.090.040.690.49
210.260.130.900.79
220.680.480.980.96
230.910.811.000.99
300.090.040.710.51
310.280.140.900.80
320.700.500.980.96
330.910.821.000.99
400.060.030.610.41
410.200.100.860.72
420.600.390.970.94
430.880.750.990.99
500.040.020.500.30
510.140.060.790.62
520.490.290.960.91
530.810.650.990.98