CR:PMC:2615549

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{{#scite:
 |PMC2615549
 |type=research-article
 |title=Comorbidity and repeat admission to hospital for adverse drug reactions in older adults: retrospective cohort study
 |author=Zhang M;Holman CD;Price SD;Sanfilippo FM;Preen DB;Bulsara MK|+sep=;
 |journal=The BMJ
 |pubdate=2009 Jan 7
 |year=2009
 |volume=338
 |pages=a2752
 |doi=10.1136/bmj.a2752
 |abstract=Objectives To identify factors that predict repeat admission to hospital for adverse drug reactions (ADRs) in older adults. Design Population based retrospective cohort study. Setting All public and private hospitals in Western Australia. Participants 28 548 patients aged ≥60 years with an admission for an ADR during 1980-2000 followed for three years using the Western Australian data linkage system. Results 5056 (17.7%) patients had a repeat admission for an ADR. Repeat ADRs were associated with sex (hazard ratio 1.08, 95% confidence interval 1.02 to 1.15, for men), first admission in 1995-9 (2.34, 2.00 to 2.73), length of hospital stay (1.11, 1.05 to 1.18, for stays ≥14 days), and Charlson comorbidity index (1.71, 1.46 to 1.99, for score ≥7); 60% of comorbidities were recorded and taken into account in analysis. In contrast, advancing age had no effect on repeat ADRs. Comorbid congestive cardiac failure (1.56, 1.43 to 1.71), peripheral vascular disease (1.27, 1.09 to 1.48), chronic pulmonary disease (1.61, 1.45 to 1.79), rheumatological disease (1.65, 1.41 to 1.92), mild liver disease (1.48, 1.05 to 2.07), moderate to severe liver disease (1.85, 1.18 to 2.92), moderate diabetes (1.18, 1.07 to 1.30), diabetes with chronic complications (1.91, 1.65 to 2.22), renal disease (1.93, 1.71 to 2.17), any malignancy including lymphoma and leukaemia (1.87, 1.68 to 2.09), and metastatic solid tumours (2.25, 1.92 to 2.64) were strong predictive factors. Comorbidities requiring continuing care predicted a reduced likelihood of repeat hospital admissions for ADRs (cerebrovascular disease 0.85, 0.73 to 0.98; dementia 0.62, 0.49 to 0.78; paraplegia 0.73, 0.59 to 0.89). Conclusions Comorbidity, but not advancing age, predicts repeat admission for ADRs in older adults, especially those with comorbidities often managed in the community. Awareness of these predictors can help clinicians to identify which older adults are at greater risk of admission for ADRs and, therefore, who might benefit from closer monitoring.
 |pmid=19129307
 |pmcid=PMC2615549
 |retrieved-from=http://www.ncbi.nlm.nih.gov/
 |retrieved-on=2017-05-28
}}

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