• Anupam B Jena, Andrew R Olenski, Dhruv Khullar, Adam Bonica, and Howard Rosenthal.
• Department of Health Care Policy, Harvard Medical School, Boston, MA 02115, USA jena@hcp.med.harvard.edu.
• BMJ. 2018 Apr 11; 361: k1161.

ObjectivesTo compare the delivery of end of life care given to US Medicare beneficiaries in hospital by internal medicine physicians with Republican versus Democrat political affiliations.DesignRetrospective observational study.SettingUS Medicare.ParticipantsRandom sample of Medicare beneficiaries, who were admitted to hospital in 2008-12 with a general medical condition, and died in hospital or shortly thereafter.Main Outcome MeasuresTotal inpatient spending, intensive care unit use, and intensive end of life treatments (eg, mechanical ventilation and gastrostomy tube insertion) among patients dying in hospital, and hospice referral among patients discharged but at high predicted risk of 30 day mortality after discharge. Physicians were categorized as Democrat, Republican, or non-donors, using federal political contribution data.ResultsAmong 1 480 808 patients, 93 976 (6.3%) were treated by 1523 Democratic physicians, 58 876 (4.0%) by 768 Republican physicians, and 1 327 956 (89.6%) by 23 627 non-donor physicians. Patient demographics and clinical characteristics were similar between groups. Democrat physicians were younger, more likely to be female, and more likely to have graduated from a top 20 US medical school than Republican physicians. Mean end of life spending, after adjustment for patient covariates and hospital specific fixed effects, was US$17 938 (£12 872; €14 612) among Democrat physicians (95% confidence interval $17 176 to $18 700) and $18 409 among Republican physicians ($17 362 to $19 456; adjusted Republican v Democrat difference, $472 (-$803 to $1747), P=0.47). Intensive end of life treatments for patients who died in hospital did not vary by physician political affiliation. The proportion of patients discharged from hospital to hospice did not vary with physician political affiliation. Among patients in the top 5% of predicted risk of death 30 days after hospital discharge, adjusted proportions of patients discharged to hospice were 15.8%, 15.0%, and 15.2% among Democrat, Republican, and non-donor physicians, respectively (adjusted difference in proportion between Republicans v Democrats, -0.8% (-2.7% to 0.9%), P=0.43).ConclusionsThis study provided no evidence that physician political affiliation is associated with the intensity of end of life care received by patients in hospital. Other treatments for politically polarised healthcare issues should be investigated.Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.

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