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Table 1 Proportion of cognitive impairment in centenarian subgroups

From: Low expression of CD39 and CD73 genes in centenarians compared with octogenarians

Mental status Overexpressed, % (n) Underexpressed, % (n)
Intact intellectual functioning (0–2 errors) 14.3 (1) 38.5 (5)
Mild intellectual impairment (3–4 errors) 0.0 (0) 23.1 (3)
Moderate intellectual impairment (5–7 errors) 57.1 (4) 7.7 (1)
Severe intellectual impairment (8–10 errors) 28.6 (2) 30.8 (4)
  1. Mental status was determined by the Spanish version of the Pfeiffer’s test [7]. p = 0.073, Chi-square test