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Aim: This study aims to explore regional variation and identify regions within Australia with high incidence of out-of-hospital cardiac arrest (OHCA) and low rates of bystander cardiopulmonary resuscitation (CPR). Method: Adult OHCAs of presumed medical aetiology occurring across Australia between 2017 and 2019 were mapped onto local government areas (LGA) using the location of arrest coordinates. Bayesian spatial models were applied to provide "smoothed" estimates of OHCA incidence and bystander CPR rates (for bystander-witnessed OHCAs) for each LGA. For each state and territory, high-risk LGAs were defined as those with an incidence rate greater than the state or territory's 75th percentile and a bystander CPR rate less than the state or territory's 25th percentile. Results: A total of 62,579 OHCA cases attended by emergency medical services across 543 LGAs nationwide were included in the study. Nationally, the OHCA incidence rate across LGA ranged from 58.5 to 198.3 persons per 100,000, while bystander CPR rates ranged from 45% to 75%. We identified 60 high-risk LGAs, which were predominantly located in the state of New South Wales. Within each region, high-risk LGAs were typically located in regional and remote areas of the country, except for four metropolitan areas–two in Adelaide and two in Perth. Conclusions: We have identified high-risk LGAs, characterised by high incidence and low bystander CPR rates, which are predominantly in regional and remote areas of Australia. Strategies for reducing OHCA and improving bystander response may be best targeted at these regions. [ABSTRACT FROM AUTHOR]

This document is a correction notice for an article titled "Identifying areas of Australia with high out-of-hospital cardiac arrest incidence and low bystander cardiopulmonary resuscitation rates: A retrospective, observational study." The correction addresses an error in Figure 10, specifically in the coloring of one of the smaller maps (bystander CPR rates Greater Perth). The corrected figure is provided in the notice. The article was authored by multiple individuals and focuses on estimating the incidence rate and bystander CPR rate for each local government area in Western Australia. [Extracted from the article]

It is well recognized that randomized controlled trials (RCTs) are a powerful tool to investigate causal relationships, and are considered the gold standard level of research evidence. However, RCTs can be expensive and time‐consuming, and when they employ strict eligibility criteria, it results in an unrepresentative population and limited external validity. Recently, the registry‐based randomized clinical trial (RRCT) has emerged as an alternative trial design. Utilizing registries to underpin such studies, RRCTs can have advantages including rapid recruitment, and enhanced generalizability. In Australia, legislated mandatory reporting of cancer diagnoses means that jurisdictional cancer registries are a rich source of systematically collected patient details, representing sound platforms for comprehensive data capture that can serve as a key tool for further research. We review the roles of cancer registries in Australia, discuss important considerations relevant to the design of RRCTs, and outline the opportunities provided by cancer registries to strengthen cancer research. [ABSTRACT FROM AUTHOR]