title: Atypical antipsychotic use and risk of fracture in persons with Parkinsonism.
abstract: Our objective was to estimate the effect of atypical antipsychotics (AAs) on the rate of fractures in a parkinsonism population. We conducted an age- and state-matched nested case-control study in five states (CA, FL, NY, OH, IL) using the Medicaid analytic extract from 2001 to 2002. Eligible participants had a diagnosis of parkinsonism, excluding persons with secondary parkinsonism, bone cancer, bone infections, schizophrenia, schizoaffective disorder, and those who used conventional antipsychotics. The primary outcome was the occurrence of a fracture of the femur, ankle, fibula, tibia, humerus, radius, or ulna (N = 851). Risk-set sampling defined controls (N = 4220). We used conditional-logistic regression to derive adjusted odds ratios (AOR) and 95% confidence intervals of the association between fracture and use of quetiapine, risperidone, or olanzapine in the 60 days before the index date compared to nonuse. After adjustment for confounding, use of quetiapine (AOR 2.4; 95% CI 1.5-3.8), risperidone (AOR 1.2; 95% CI 0.9-1.7), or olanzapine (AOR 1.7; 95% CI 1.2-2.4) was associated with a higher rate of fracture. Use of an AA was associated with a higher rate of fracture in persons with parkinsonism. Prescribers must be cautious when using these agents in elderly persons with parkinsonism.
authors: i3 Drug Safety, 950 Winter Street, Suite 3800, Waltham, Massachusetts, USA. david.dore@i3drugsafety.com
authors: David D
authors: DD
authors: Dore
authors: Amal N
authors: AN
authors: Trivedi
authors: Vincent
authors: V
authors: Mor
authors: Joseph H
authors: JH
authors: Friedman
authors: Kate L
authors: KL
authors: Lapane
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014150:Antipsychotic Agents / Q000009:adverse effects* / Q000145:classification / Q000627:therapeutic use; D016022:Case-Control Studies; D016001:Confidence Intervals; D016208:Databases, Factual / Q000706:statistics & numerical data; D005260:Female; D050723:Fractures, Bone / Q000139:chemically induced*; D006801:Humans; D016015:Logistic Models; D008297:Male; D008484:Medicaid / Q000706:statistics & numerical data; D008875:Middle Aged; D016017:Odds Ratio; D020734:Parkinsonian Disorders / Q000188:drug therapy; D018570:Risk Assessment; D012307:Risk Factors; D014481:United States
chemical_list: D014150:Antipsychotic Agents