Table 1 

Power of Scoring Index 

Scenario 1: Equal N 
Scenario 2: Unequal N 

K 
Max SI 
Optimal SI 
Max SI 
Optimal SI 


2 
0.78 
1 
0.56 
0.99 
3 
0.97 
1 
0.64 
0.97 
4 
0.99 
1 
0.86 
0.99 
5 
1 
1 
0.99 
1 
6 
0.99 
1 
0.99 
0.99 
7 
1 
1 
0.99 
0.99 
8 
1 
1 
0.99 
0.99 
9 
1 
1 
0.99 
0.99 
10 
1 
1 
1 
1 


We report the proportion of datasets for which the correct number of clusters is identified and the subjects are correctly allocated their respective cluster. The maximum SI corresponds to the cluster size at which the SI is maximized and the optimal SI corresponds to the smallest cluster size for which the SI falls within the 95% CI of the maximum SI. 

Solovieff et al. BMC Genetics 2010 11:108 doi:10.1186/1471215611108 