BackgroundIt remains challenging to identify patients at risk of out‐of‐hospital cardiac arrest (OHCA). We aimed to examine health care contacts in patients before OHCA compared with the general population that did not experience an OHCA.Methods and ResultsPatients with OHCA with a presumed cardiac cause were identified from the Danish Cardiac Arrest Registry (2001–2014) and their health care contacts (general practitioner [GP]/hospital) were examined up to 1 year before OHCA. In a case‐control study (1:9), OHCA contacts were compared with an age‐ and sex‐matched background population. Separately, patients with OHCA were examined by the contact type (GP/hospital/both/no contact) within 2 weeks before OHCA. We included 28 955 patients with OHCA. The weekly percentages of patient contacts with GP the year before OHCA were constant (25%) until 1 week before OHCA when they markedly increased (42%). Weekly percentages of patient contacts with hospitals the year before OHCA gradually increased during the last 6 months (3.5%–6.6%), peaking at the second week (6.8%) before OHCA; mostly attributable to cardiovascular diseases (21%). In comparison, there were fewer weekly contacts among controls with 13% for GP and 2% for hospital contacts (P<0.001). Within 2 weeks before OHCA, 57.8% of patients with OHCA had a health care contact, and these patients had more contacts with GP (odds ratio [OR], 3.17; 95% CI, 3.09–3.26) and hospital (OR, 2.32; 95% CI, 2.21–2.43) compared with controls.ConclusionsThe health care contacts of patients with OHCA nearly doubled leading up to the OHCA event, with more than half of patients having health care contacts within 2 weeks before arrest. This could have implications for future preventive strategies.

中文翻译：

---

院外心脏骤停前与医疗保健系统的联系

背景识别有院外心脏骤停（OHCA）风险的患者仍然具有挑战性。我们旨在将 OHCA 之前的患者与未经历 OHCA 的普通人群进行医疗保健接触。方法和结果从丹麦心脏骤停登记处（2001-2014 年）及其医疗保健中确定了疑似心脏原因的 OHCA 患者接触者（全科医生 [GP]/医院）在 OHCA 之前最多 1 年进行检查。在一项病例对照研究 (1:9) 中，将 OHCA 接触者与年龄和性别匹配的背景人群进行了比较。另外，OHCA 患者在 OHCA 前 2 周内按接触类型（GP/医院/两者/无接触）进行检查。我们纳入了 28 955 名 OHCA 患者。OHCA 前一年每周与 GP 接触的患者百分比保持不变（25%），直到 OHCA 前 1 周显着增加（42%）。OHCA 前一年每周与医院接触的患者百分比在过去 6 个月中逐渐增加（3.5%–6.6%），在 OHCA 前第二周达到峰值（6.8%）；主要归因于心血管疾病（21%）。相比之下，对照组每周接触的次数较少，GP 为 13%，医院接触为 2%（P <0.001)。在 OHCA 前 2 周内，57.8% 的 OHCA 患者接触过医疗保健，这些患者接触过更多的 GP（比值比 [OR]，3.17；95% CI，3.09-3.26）和医院（OR，2.32； 95% CI, 2.21–2.43) 与对照组相比。结论 OHCA 患者的医疗保健接触几乎翻了一番，导致 OHCA 事件发生，超过一半的患者在逮捕前 2 周内有医疗保健接触。这可能对未来的预防策略产生影响。