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Table 4 Sensitivity and specificity of DSR in the discrimination of Alzheimer’s disease and mild cognitive impairment and positive predictive values (PPV) and negative predictive values (NPV) at different base rates

From: The Chinese version of story recall: a useful screening tool for mild cognitive impairment and Alzheimer’s disease in the elderly

Alzheimer’s disease PPV/NPV at different base rate
DSR cutoff Sensitivity Specificity 10% 20%% 30% 40% 50%
6.50 0.992 0.907 0.54/1.00 0.73/1.00 0.60/1.00 0.64/0.99 0.68/0.99
7.50 0.988 0.907 0.54/1.00 0.73/1.00 0.82/0.99 0.88/0.99 0.91/0.99
9.00 0.988 0.918 0.57/1.00 0.75/1.00 0.84/0.99 0.89/0.99 0.92/0.99
*10.50 0.980 0.938 0.63/1.00 0.80/1.00 0.87/0.99 0.91/0.98 0.94/0.98
11.50 0.972 0.938 0.63/1.00 0.80/1.00 0.87/0.99 0.91/0.98 0.94/0.97
12.50 0.952 0.959 0.72/1.00 0.85/0.99 0.91/0.98 0.94/0.97 0.96/0.95
14.00 0.923 0.969 0.77’0.99 0.88/0.98 0.93/0.97 0.95/0.95 0.97/0.93
Mild cognitive impairment PPV/NPV at different base rate
DSR cutoff Sensitivity Specificity 10% 20% 30% 40% 50%
12.50 0.952 0.739 0.29/0.99 0.48/0.98 0.60/0.97 0.71/0.96 0.78/0.94
14.00 0.923 0.761 0.30/0.99 0.49/0.98 0.62/0.96 0.72/0.94 0.79/0.91
*15.50 0.899 0.799 0.33/0.99 0.53/0.97 0.66/0.95 0.75/0.92 0.82/0.89
16.50 0.879 0.821 0.35/0.98 0.55/0.96 0.68/0.94 0.77/0.91 0.83/0.87
17.50 0.855 0.821 0.35/0.98 0.54/0.96 0.67/0.93 0.76/0.89 0.83/0.85
18.50 0.819 0.836 0.36/0.98 0.56/0.95 0.68/0.92 0.77/0.87 0.83/0.82
19.50 0.782 0.843 0.36/0.97 0.55/0.94 068/0.90 0.77/0.85 0.83/0.79
  1. Note: *indicates the cutoff with optimal sensitivity and specificity.