PT - JOURNAL ARTICLE AU - Martin Schwellnus AU - Courtney Kipps AU - William O Roberts AU - Jonathan A Drezner AU - Pierre D’Hemecourt AU - Chris Troyanos AU - Dina Christina Janse van Rensburg AU - Jannelene Killops AU - Jill Borresen AU - Mark Harrast AU - Paolo E Adami AU - Stéphane Bermon AU - Xavier Bigard AU - Sergio Migliorini AU - Esme Jordaan AU - Mats Borjesson TI - Medical encounters (including injury and illness) at mass community-based endurance sports events: an international consensus statement on definitions and methods of data recording and reporting AID - 10.1136/bjsports-2018-100092 DP - 2019 Sep 01 TA - British Journal of Sports Medicine PG - 1048--1055 VI - 53 IP - 17 4099 - http://bjsm.bmj.com/content/53/17/1048.short 4100 - http://bjsm.bmj.com/content/53/17/1048.full SO - Br J Sports Med2019 Sep 01; 53 AB - Mass participation endurance sports events are popular but a large number of participants are older and may be at risk of medical complications during events. Medical encounters (defined fully in the statement) include those traditionally considered ‘musculoskeletal’ (eg, strains) and those due to ‘illness’ (eg, cardiac, respiratory, endocrine). The rate of sudden death during mass endurance events (running, cycling and triathlon) is between 0.4 and 3.3 per 100 000 entrants. The rate of other serious medical encounters (eg, exertional heat stroke, hyponatraemia) is rarely reported; in runners it can be up to 100 times higher than that of sudden death, that is, between 16 and 155 per 100 000 race entrants. This consensus statement has two goals. It (1) defines terms for injury and illness-related medical encounters, severity and timing of medical encounters, and diagnostic categories of medical encounters, and (2) describes the methods for recording data at mass participation endurance sports events and reporting results to authorities and for publication. This unifying consensus statement will allow data from various events to be compared and aggregated. This will inform athlete/patient management, and thus make endurance events safer.