Table 1

Baseline characteristics by number of comorbidities

 Number of comorbidities
Low 0 or 1Moderate 2 or 3High 4 or 5Very high ≥6
Number of cases (%)1071 (21.4%)1691 (33.8%)1391 (27.8%)846 (16.9%)
Female (%)67.0%66.8%63.6%61.4%
Age in years, mean (SD)79.5 (9.2)81.4 (7.8)82.0 (7.8)82.7 (7.0)
Age group (%)
 <75 years26.218.316.411.9
 75–79 years21.819.318.019.0
 80–84 years23.228.027.030.4
 85–89 years18.723.825.827.3
 ≥90 years10.210.612.811.4
IMD quintile* (%)
 First (least deprived)24.325.124.020.6
 Second25.825.422.020.4
 Third18.719.819.420.9
 Fourth19.418.019.820.6
 Fifth (most deprived)11.811.714.817.5
Dementia medication† (%)37.332.928.123.8
  • *Only 2959 observations due to missing data.

  • †Acetylcholinesterase inhibitors or memantine.

  • IMD, Index of Multiple Deprivation.