RT Journal Article SR Electronic T1 The ocean lifeguard drowning prevention paradigm: how and where do lifeguards intervene in the drowning process? JF Injury Prevention JO Inj Prev FD BMJ Publishing Group Ltd SP 296 OP 299 DO 10.1136/injuryprev-2017-042468 VO 24 IS 4 A1 William Koon A1 Ali Rowhani-Rahbar A1 Linda Quan YR 2018 UL http://injuryprevention.bmj.com/content/24/4/296.abstract AB Drowning is a global health problem that can be addressed with multiple strategies including utilisation of lifeguards in recreational swim areas. However, few studies have described lifeguard prevention activities. We conducted a retrospective analysis using lifeguard activity data collected in real time with a Computer-Aided-Dispatch (CAD) system to characterise the nature of lifeguard primary and secondary drowning prevention at a popular ocean beach in California. Preventative actions constituted the majority (232 065/423 071; 54.8%) of lifeguard activities, while rescues represented 1.9%. Most preventative actions and rescues occurred during summer months, weekends and afternoons. Statistically significant geographical clusters of preventative actions were identified all over the beach, while rescue clusters were primarily restricted to two sites. Using the most reliable and valid collection system to date, these data show spatial and temporal patterns for ocean lifeguard provision of primary prevention as well as secondary drowning prevention (rescue).