Medication use before and after hip fracture: a population-based cohort and case-control study.

Abstract

Osteoporosis, together with age, is the main risk factor for hip fracture, the incidence of which has also been associated with an increased risk of falling or co-morbidities and related pharmacological treatments. The aim of this study was to investigate changes in concomitant pharmacological treatments prescribed before and after hip fracture in elderly patients compared with treatments prescribed to a matched cohort of subjects without hospitalisation for fractures. Data relating to the study population were extracted from a large population-based administrative database of the Italian National Health Authorities. A retrospective analysis was conducted involving female patients (6,431) aged ≥65 years and hospitalised for a hip fracture. The control group comprised age-matched subjects (38,586) not hospitalised for fracture. Changes in drug prescriptions 1 year before and 1 year after hip fracture and differences versus controls were compared. Prior to the fracture, patients were taking more anti-Parkinson medications, antidepressants, medications for chronic obstructive pulmonary disease (COPD), bisphosphonates and calcium-vitamin D supplements, although the intake of the routinely monitored drug classes was significantly infrequent. Polypharmacy was less frequent in fractured women before fracture than in controls (22 vs. 25 %, respectively; P < 0.001), but it was more frequent (30 %, P < 0.001) post-fracture. The incidence of fracture was associated with a significant increase in the use of a number of drug classes: insulin, NSAIDs or analgesics, gastroprotectants, loop diuretics, β-blockers, antidepressants, antiparkinson drugs, antiepileptics and drugs for COPD. Our study confirms a strong association between the use of some drugs (antidepressants, antiparkinson drugs, drugs for COPD) and the risk of hip fracture, but drug use is globally less common than in controls. Hip fracture is associated with a significant increase in drug use, suggesting a global deterioration of health conditions.