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Table 1 Demographic characteristics Demographic characteristics of the family members in the well-performing (Cluster 1), impaired (Cluster 2), and intermediate (Cluster 3) clusters.

From: Family-based clusters of cognitive test performance in familial schizophrenia

  Cluster 1 (n = 94, 17 families) Cluster 2 (n = 50, 12 families) Cluster 3 (n = 115, 25 families)
  Mean SD Mean SD Mean SD
Sex (F/M) 48/46   24/26   50/65  
Age 48.8 9.4 52.3 12.6 48.5 11.3
Education years 11.3a,b 3.0 9.3 2.4 9.9 2.3
  1. aContrast versus cluster 1 and 2, p < 0.001, t-test, two-tailed. bContrast versus cluster 1 and 3, p < 0.001, t-test, two-tailed.