Table 5

Incidences of specific medical complications by organ system affected and by final diagnosis in all runners and all years

SystemAll runners
Incidence per 100095% CI
Cardiovascular1.931.62 to 2.29
 Serious cardiac
  All serious cardiac0.120.06 to 0.24
  Ischaemic heart disease0.050.01 to 0.14
  Arrhythmia0.030.01 to 0.12
  Myocarditis0.050.01 to 0.14
 Postural hypotension1.751.45 to 2.10
 Other cardiovascular0.060.02 to 0.16
Musculoskeletal1.311.06 to 1.61
Dermatological1.371.11 to 1.68
Serious exercise-associated muscle cramps0.910.71 to 1.17
Gastrointestinal0.880.68 to 1.14
Respiratory0.530.38 to 0.74
 Asthma0.180.10 to 0.32
 Infection0.210.13 to 0.36
 Pulmonary oedema0.030.01 to 0.12
 Respiratory other0.110.05 to 0.22
Fluid, electrolyte and acid–base0.430.29 to 0.62
 Hyponatraemia0.230.14 to 0.38
 Dehydration0.180.10 to 0.32
 Acidosis0.020.00 to 0.11
Metabolic0.240.15 to 0.40
Fatigue0.260.16 to 0.42
CNS0.140.07 to 0.26
 Convulsions0.020.00 to 0.11
 Confusion0.020.00 to 0.11
 Other collapse0.030.01 to 0.12
 Concussion0.050.01 to 0.14
 CNS other0.030.01 to 0.12
Temperature regulation0.140.07 to 0.26
 Hyperthermia0.090.04 to 0.20
 Hypothermia0.050.01 to 0.14
Renal0.050.01 to 0.14
Other0.110.05 to 0.22
  • CNS, central nervous system.