Analysed patients | Minimum number of observed failures needed to stop groupa | Maximum probability of stopping group if true cure rate equals: | Minimum probability of stopping group if true cure rate equals: | ||||
---|---|---|---|---|---|---|---|
90% | 95% | 90% | 80% | 70% | 60% | ||
3–7 | 3 | 0.026 | 0.004 | 0.001 | 0.008 | 0.027 | 0.064 |
8–13 | 4 | 0.034 | 0.003 | 0.005 | 0.056 | 0.194 | 0.406 |
14–20 | 5 | 0.043 | 0.003 | 0.009 | 0.130 | 0.416 | 0.721 |
21–26 | 6 | 0.040 | 0.002 | 0.014 | 0.231 | 0.637 | 0.904 |
27–33 | 7 | 0.042 | 0.001 | 0.015 | 0.287 | 0.744 | 0.958 |
34–39b | 8 | 0.037 | 0.001 | 0.017 | 0.367 | 0.844 | 0.986 |
40–41b | 8 | 0.048 | 0.001 | 0.042 | 0.563 | 0.945 | 0.998 |
42–48 | 9 | 0.046 | 0.001 | 0.021 | 0.469 | 0.920 | 0.997 |
49–55 | 10 | 0.044 | 0.0004 | 0.022 | 0.528 | 0.952 | 0.999 |
56–63 | 11 | 0.047 | 0.0003 | 0.021 | 0.580 | 0.971 | 1.000 |
64–71 | 12 | 0.048 | 0.0002 | 0.023 | 0.648 | 0.985 | 1.000 |
72–78 | 13 | 0.045 | 0.0001 | 0.025 | 0.705 | 0.993 | 1.000 |