Abstract：
IMPORTANCE:risk factors for delirium in hospital inpatients are well established, but less is known about whether delirium occurring in the community or during an emergency admission to hospital care might be predicted from routine primary-care records. OBJECTIVES:identify risk factors in primary-care electronic health records (PC-EHR) predictive of delirium occurring in the community or recorded in the initial episode in emergency hospitalisation. Test predictive performance against the cumulative frailty index. DESIGN:Stage 1: case-control; Stages 2 and 3: retrospective cohort. SETTING:clinical practice research datalink: PC-EHR linked to hospital discharge data from England. SUBJECTS:Stage 1: 17,286 patients with delirium aged ≥60 years plus 85,607 controls. Stages 2 and 3: patients ≥ 60 years (n = 429,548 in 2015), split into calibration and validation groups. METHODS:Stage 1: logistic regression to identify associations of 110 candidate risk measures with delirium. Stage 2: calibrating risk factor weights. Stage 3: validation in independent sample using area under the curve (AUC) receiver operating characteristic. RESULTS:fifty-five risk factors were predictive, in domains including: cognitive impairment or mental illness, psychoactive drugs, frailty, infection, hyponatraemia and anticholinergic drugs. The derived model predicted 1-year incident delirium (AUC = 0.867, 0.852:0.881) and mortality (AUC = 0.846, 0.842:0.853), outperforming the frailty index (AUC = 0.761, 0.740:0.782). Individuals with the highest 10% of predicted delirium risk accounted for 55% of incident delirium over 1 year. CONCLUSIONS:a risk factor model for delirium using data in PC-EHR performed well, identifying individuals at risk of new onsets of delirium. This model has potential for supporting preventive interventions.
journal_name
Age Ageingjournal_title
Age and ageingauthors
Bowman K,Jones L,Masoli J,Mujica-Mota R,Strain D,Butchart J,Valderas JM,Fortinsky RH,Melzer D,Delgado Jdoi
10.1093/ageing/afaa006subject
Has Abstractpub_date
2020-04-27 00:00:00pages
374-381issue
3eissn
0002-0729issn
1468-2834pii
5814887journal_volume
49pub_type
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