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Table 3 Effectiveness and cost of the screening tests for dementia

From: Effectiveness and costs of phototest in dementia and cognitive impairment screening

Test CoP Sn Sp DA k Total Cost (€) Cost/CD (€) Mean cost (€)
MMSE 24/25 1.00 (0.93-1.00) 0.38 (0.28-0.49) 0.59 (0.46-0.73) 0.30 (0.16-0.44) 47134.5 585.2 336.7 ± 169.9
MMSEc 24/25 1.00 (0.93-1.00) 0.37 (0.27-0.48) 0.58 (0.46-0.72) 0.29 (0.15-0.43) 47525.4 570.6 339.5 ± 168.2
MMSE * 0.96 (0.86-0.99) 0.62 (0.51-0.72) 0.74 (0.60-0.89) 0.50 (0.36-0.64) 38621.7 377.9 275.9 ± 193.3
MIS# 3/4 0.93 (0.78-0.99) 0.80 (0.71-0.88) 0.83 (0.67-1.00) 0.63 (0.48-0.78) 23548.6 242.5 201.3 ± 193.4
MIS# 4/5 0.96 (0.78-1.00) 0.71 (0.61-0.80) 0.78 (0.73-1.00) 0.54 (0.38-0.69) 26632.5 295.6 227.6 ± 196.4
Phototest 26/27 0.81 (0.67-0.91) 0.89 (0.81-0.95) 0.86 (0.72-1.00) 0.70 (0.57-0.83) 29153.7 242.1 208.2 ± 196.8
  1. CoP: Cutoff point; Sn: sensitivity; Sp: specificity; DA: diagnostic accuracy (proportion of correct diagnoses); k: kappa index. Cost/CD: total cost divided by n° correct diagnoses. Mean cost: mean ± sd. In brackets, 95% confidence interval.
  2. MMSE: MiniMental State Examination. MMSEc: MMSE with corrected scores. MIS: Memory Impairment Screen
  3. *Cutoff points: 17/18: illiterates; 20/21: literate but did not complete primary schooling; 23/24: primary schooling or higher
  4. #Results for the 117 subjects who completed the MIS