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Table 2 Classification of MMSE states at screen and assessment waves*

From: The reliability of assigning individuals to cognitive states using the Mini Mental-State Examination: a population-based prospective cohort study

Tombaugh and McIntyre criteria   
   MMSE at assessment   
   < 18 18-23 24-30   
MMSE at screen < 18 237 (3%) 56 (3%) 2 (< 0.1%)   
  18-23 132 (1%) 451 (13%) 228 (11%)   
  24-30 6 (< 0.1%) 208 (7%) 955 (62%)   
Folstein et al. criteria
   MMSE at assessment
   < 10 11-20 21-26 27-30
MMSE at screen < 10 39 (< 1%) 13 (1%) 0   0  
  11-20 37 (< 1%) 373 (7%) 122 (6%) 3 (1%)
  21-26 0   165 (3%) 763 (31%) 289 (12%)
  27-30 0   6 (< 0.1%) 145 (13%) 320 (28%)
MRC CFAS criteria
   MMSE at assessment
   < 18 18-22 23-26 27-30
MMSE at screen < 18 237 (3%) 52 (3%) 6 (< 1%) 0  
  18-22 129 (1%) 305 (8%) 173 (7%) 18 (1%)
  23-26 8 (< 0.1%) 173 (5%) 429 (19%) 274 (11%)
  27-30 1 (< 0.1%) 16 (< 1%) 134 (12%) 320 (28%)
  1. *Number observed (weighted percentage)