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Table 4 Prevalence and odds ratios for individual mental health conditions (standardised by age, gender and deprivation score). Conditions are ordered by size of odds ratio (largest too smallest)

From: Co-morbidity and polypharmacy in Parkinson’s disease: insights from a large Scottish primary care database

Condition Parkinson’s N (prevalence %) N = 2640 No Parkinson’s N (prevalence %) N = 507,862 Odds ratio (95% CI) (standardised by age, gender and deprivation)a
Schizophrenia (and related non-organic psychosis) or bipolar disorder 92 (3.5) 5216 (1.0) 3.77 (3.05–4.66)
Dementia 319 (12.2) 10,873 (2.1) 3.31 (2.91–3.77)
Learning Disability 15 (0.6) 1337 (0.3) 3.06 (1.82–5.13)
Depression 738 (28.0) 62,774 (12.4) 3.02 (2.76–3.29)
Anxiety & other neurotic, stress related & somatoform disorders 431 (16.3) 32,991 (6.5) 2.32 (2.08–2.59)
Alcohol misuse 83 (3.1) 18,454 (3.6) 1.01 (0.81–1.27) p = 0.87
Anorexia or bulimia 5 (0.2) 1007 (0.5) 0.91 (0.38–2.21) p = 0.85
  1. aAll differences significant at p < 0.001 except where stated