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Table 2 Distribution of dementia subtypes [n (%)] following the ONS change in dementia coding practice of 2011

From: Implementation of the Mental Capacity Act: a national observational study comparing resultant trends in place of death for older heart failure decedents with or without comorbid dementia

Coding Pre- coding change Post-coding change Total
AD 642 (12.8) 465 (14.6) 1107 (13.5)
UD 4287 (85.5) 2128 (66.8) 6415 (78.2)
VD 84 (1.7) 593 (18.6) 677 (8.3)
Total 5013 (61.1) 3186 (38.9) 8199 (100)
  1. AD Alzheimer’s disease, UD unspecified dementia, VD vascular dementia
  2. The p values for comparison of the proportions of UD and VD pre- and post-coding change were statistically significant (p< 0.0001)