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Table 2 Estimated minimum sample size for a range of parameters, for the overall survival model (also valid for the locoregional control and freedom from distant metastasis models)

From: Development and validation of prognostic models for anal cancer outcomes using distributed learning: protocol for the international multi-centre atomCAT2 study

Parameters included in the model Minimum sample size
5 641
6 769
7 897
8 1025
9 1153
10 1283
11 1409