Table 3

Learning curve cumulative summation (LC-Cusum) analysis of competence of independent colonoscopists (numbered 1–15) using different values for p1

Percentage completePractitioner crossed upper control limit (for different values of p1)
ColonoscopistHospitalN0.300.250.200.190.180.170.160.15
1GRH28690YesYesYesNoNoNoNoNo
2GRH19395YesYesYesYesYesYesYesNo
3GRH58393YesYesYesYesYesYesYesYes
4GRH16590YesYesYesYesNoNoNoNo
5GRH30191YesYesYesYesYesYesNoNo
6GRH41393YesYesYesYesYesYesYesYes
7GRH42793YesYesYesYesYesYesYesYes
8GRH21792YesYesYesYesYesNoNoNo
9GRH52191YesYesYesYesYesYesNoNo
10QEH41392YesYesYesYesYesYesYesNo
11QEH28794YesYesYesYesYesYesYesYes
12QEH18290YesYesYesYesNoNoNoNo
13QEH16191YesYesYesYesYesNoNoNo
14QEH14492YesYesYesNoNoNoNoNo
15QEH14590YesYesYesYesNoNoNoNo
Median nMean % complete Percentage of practitioners who crossed upper control limit (for different values of P1)
286921001001008767534027
  • GRH, Gloucestershire Royal Hospital; QEH, Queen Elizabeth Hospital.