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Background Heart failure is an important public health issue affecting about 1 million people in the UK, but contemporary trends in cause-specific outcomes among different population groups are unknown.Methods In this retrospective, population-based study, we used the UK Clinical Practice Research Datalink and Hospital Episodes Statistics databases to identify a cohort of patients who had a diagnosis of incident heart failure between Jan 1, 1998, and July 31, 2017. Patients were eligible for inclusion if they were aged 30 years or older with a first code for heart failure in their primary care or hospital record during the study period. We assessed cause-specific admission to hospital (ie, hospitalisation) and mortality, by age, sex, socioeconomic status, and place of diagnosis (ie, hospital vs community diagnosis). We calculated outcome rates separately for the first year (first-year rates) and for the second-year onwards (subsequent-year rates). Patients were followed up until death or study end. This study is registered with Clinical Practice Research Datalink Independent Scientific Advisory Committee, protocol number 18_037R.Findings We identified 88 416 individuals with incident heart failure over the study period, of whom 43 461 (49%) were female. The mean age was 77.8 years (SD 11.3) and median follow-up was 2.4 years (IQR 0.5 to 5.7). Age-adjusted first-year rates of hospitalisation increased by 28% for all-cause admissions, from 97.1 (95% CI 94.3 to 99.9) to 124.2 (120.9 to 127.5) per 100 person-years; by 28% for heart failure-specific admissions, from 17.2 (16.2 to 18.2) to 22.1 (20.9 to 23.2) per 100 person-years; and by 42% for non-cardiovascular admissions, from 59.2 (57.2 to 61.2) to 83.9 (81.3 to 86.5) per 100 person-years. 167 641 (73%) of 228 113 hospitalisations were for non-cardiovascular causes and annual rate increases were higher for women (3.9%, 95% CI 2.8 to 4.9) than for men (1.4%, 0.6 to 2.1; pInterpretation Tailored management strategies and specialist care for patients with heart failure are needed to address persisting and increasing inequalities for men, the most deprived, and for those who are diagnosed with heart failure in hospital, and to address the worrying trends in women. Copyright (C) 2019 The Author(s). Published by Elsevier Ltd.

Background Heart failure is an important public health issue affecting about 1 million people in the UK, but contemporary trends in cause-specific outcomes among different population groups are unknown. Methods In this retrospective, population-based study, we used the UK Clinical Practice Research Datalink and Hospital Episodes Statistics databases to identify a cohort of patients who had a diagnosis of incident heart failure between Jan 1, 1998, and July 31, 2017. Patients were eligible for inclusion if they were aged 30 years or older with a first code for heart failure in their primary care or hospital record during the study period. We assessed cause-specific admission to hospital (ie, hospitalisation) and mortality, by age, sex, socioeconomic status, and place of diagnosis (ie, hospital vs community diagnosis). We calculated outcome rates separately for the first year (first-year rates) and for the second-year onwards (subsequent-year rates). Patients were followed up until death or study end. This study is registered with Clinical Practice Research Datalink Independent Scientific Advisory Committee, protocol number 18_037R. Findings We identified 88 416 individuals with incident heart failure over the study period, of whom 43 461 (49%) were female. The mean age was 77.8 years (SD 11.3) and median follow-up was 2.4 years (IQR 0.5 to 5.7). Age-adjusted first-year rates of hospitalisation increased by 28% for all-cause admissions, from 97.1 (95% CI 94.3 to 99.9) to 124.2 (120.9 to 127.5) per 100 person-years; by 28% for heart failure-specific admissions, from 17.2 (16.2 to 18.2) to 22.1 (20.9 to 23.2) per 100 person-years; and by 42% for non-cardiovascular admissions, from 59.2 (57.2 to 61.2) to 83.9 (81.3 to 86.5) per 100 person-years. 167 641 (73%) of 228 113 hospitalisations were for non-cardiovascular causes and annual rate increases were higher for women (3.9%, 95% CI 2.8 to 4.9) than for men (1.4%, 0.6 to 2.1; p Interpretation Tailored management strategies and specialist care for patients with heart failure are needed to address persisting and increasing inequalities for men, the most deprived, and for those who are diagnosed with heart failure in hospital, and to address the worrying trends in women. Copyright (C) 2019 The Author(s). Published by Elsevier Ltd.