Table 5 Stability of modified-iKM in comparison to the original iKM method
From: IPDfromKM: reconstruct individual patient data from published Kaplan-Meier survival curves
Modified-iKM | Original iKM | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Interval | Lower | Upper | trisk | nrisk | \(\widehat {nrisk}\) | \(\widehat {ncensor}\) | \(\widehat {nrisk}\) | \(\widehat {ncensor}\) | ||
When 6-interval information is used: | ||||||||||
1 | 1 | 19 | 0 | 200 | 200 | 6 | 200 | 6 | ||
2 | 20 | 43 | 10 | 177 | 177 | 3 | 177 | 3 | ||
3 | 44 | 63 | 20 | 133 | 133 | 41 | 133 | 41 | ||
4 | 64 | 87 | 30 | 64 | 64 | 15 | 64 | 17 | ||
5 | 88 | 117 | 40 | 24 | 24 | 3 | 24 | 2 | ||
6 | 118 | 132 | 50 | 7 | 7 | 5 | 7 | 7 | ||
When 11-interval information is used: | ||||||||||
1 | 1 | 10 | 0 | 200 | 200 | 0 | 200 | 0 | ||
2 | 11 | 19 | 5 | 191 | 191 | 6 | 191 | 6 | ||
3 | 20 | 32 | 10 | 177 | 177 | 0 | 177 | -3 | ||
4 | 33 | 43 | 15 | 153 | 153 | 3 | 153 | 3 | ||
5 | 44 | 53 | 20 | 133 | 133 | 20 | 133 | 19 | ||
6 | 54 | 63 | 25 | 100 | 100 | 21 | 100 | 22 | ||
7 | 64 | 77 | 30 | 64 | 64 | 3 | 64 | 6 | ||
8 | 78 | 87 | 35 | 39 | 39 | 11 | 39 | 11 | ||
9 | 88 | 103 | 40 | 24 | 24 | 0 | 24 | -2 | ||
10 | 104 | 117 | 45 | 12 | 12 | 2 | 11 | 2 | ||
11 | 118 | 132 | 50 | 7 | 7 | 5 | 7 | 7 | ||