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Table 2 Prevalence and odds ratio for number and type of comorbidities (standardised by age, gender, and deprivation score)

From: Multiple physical and mental health comorbidity in adults with intellectual disabilities: population-based cross-sectional analysis

  Intellectual disabilities No Intellectual disabilities Odds ratio (95 % CI) (standardised by age, gender and deprivation)
N (prevalence %) N (prevalence %)
N = 8014 (0.6 %) N = 1,416,364 (99.4 %)
Total number of morbiditiesa    
 None 2552 (31.8) 731,181 (51.6) 0.26 (0.25–0.27)
 One 2207 (27.5) 301,743 (21.3) 1.48 (1.41–1.55)
 Two 1498 (18.7) 162,371 (11.5) 2.13 (1.99–2.26)
 Three 874 (10.9) 96,256 (6.8) 2.28 (2.10–2.46)
 Four 471 (5.9) 57,231 (4.0) 2.07 (1.87–2.29)
 Five or more 412 (5.1) 67,582 (4.8) 1.60 (1.44–1.79)
Total number of physical conditions    
 None 3087 (38.5) 799,884 (56.5) 0.27 (0.25–0.29)
 One 2397 (29.9) 294,613 (20.8) 1.79 (1.71–1.80)
 Two 1428 (17.8) 149,477 (10.5) 2.50 (2.34–2.66)
 Three 631 (7.9) 83,016 (5.9) 1.96 (1.79–2.15)
 Four 309 (3.9) 45,587 (3.3) 1.76 (1.56–1.99)
 Five or more 162 (2.0) 43,787 (3.1) 0.95 (0.81–1.12) p = 0.59
Total number of mental health conditionsa    
 None 5878 (73.4) 1,205,242 (85.1) 0.42 (0.40–0.44)
 One 1577 (19.7) 160,958 (11.4) 2.10 (1.99–2.23)
 Two 471 (5.9) 43,232 (3.1) 2.26 (2.05–2.48)
 Three or more 88 (1.1) 6932 (0.5) 2.43 (1.96–3.00)
  1. One-way analysis of variance
  2. All difference significant at p < 0.001 except where marked
  3. aExcluding intellectual disabilities