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Table 3 Diagnostic values of ten random training sets compared to corresponding test sets

From: Bayesian predictors of very poor health related quality of life and mortality in patients with COPD

Training set number Sensitivity Specificity Diagnostic accuracy Positive predictive value Negative predictive value
1 23.4 95.4 78.5 61.1 80.2
2 15.6 94.8 77.0 46.7 79.5
3 21.7 93.5 77.0 50 80
4 16.7 96.1 77.0 57.1 78.5
5 30.2 87.8 72.5 47.1 77.7
6 12.1 96.5 72.0 58.3 72.9
7 15.4 92.6 72.5 42.1 75.7
8 4.2 97.4 75.0 33.3 76.3
9 41.1 85.4 73.0 52.3 78.9
10 14.4 88.1 67.0 32 72
mean 19.5 92.8 74.2 48 77.2
standard deviation 10.3 4.2 3.4 9.9 2.9