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Relative risk in cycling

Risk per participant   Risk by time   Deaths per year   Risk per lifetime   Risk by distance and age

The promotion of cycle helmets portrays cycling as an especially risky activity, but examination of comparative risk data reveals otherwise. It transpires that cycling is in fact one of the safest ways to spend one's time. As well as being safer than the obvious high-risk sports such as climbing, it is also much safer than more 'ordinary' sports such as football, swimming or fishing and, indeed, safer than general 'living' (the net outcome of all causes of death).

The data below compare cycling with other activities based on different indicators.

Risk relative to cycling based on fatality rates per participant (UK)

   
Relative risk per participant
Less safe Airsports
450
  Climbing
137
  Motor sports
81
  Fishing
41
  Horse riding
29
  Swimming
7.0
  Athletics
5.7
  Football
4.9
  Tennis
4.2
  Cycling
1.0
Safer Golf
0.83
  Rambling
0.06

Figures relate to 1986 and are derived from OPAS Monitors from the Office of Population Censuses and Surveys, UK.
The number of fatalities are taken from Coroner's Court records and information on participation rates from the General Household Survey.

Risk by time (US)

   
Fatalities per million hours
Less safe Sky diving
128.71
  General aviation
15.58
  On-road motorcycling
8.80
  Scuba diving
1.98
  Living (all causes of death)
1.53
  Swimming
1.07
  Snowmobiling
0.88
  Passenger cars
0.47
  Water skiing
0.28
  Bicycling
0.26
Safer Flying (scheduled domestic airlines)
0.15
  Hunting
0.08
  Cosmic radiation from transcontinental flights
0.035
  Home living (active)
0.027
  Traveling in a school bus
0.022
  Passenger car post-collision fire
0.017
  Home living (including sleeping)
0.014
  Residential fire
0.003

Data from Failure Analysis Associates, Inc (now Exponent Inc), Design News, 10 April 1993.

Deaths per year (GB)

 

Deaths per year

Cycling, road traffic accidents

138

Cycling, other

29

All transport

3,032

At home

3,974

Other accidents

5,026

Obesity (England only)

30,000

Heart disease due to inactivity

58,090

All heart disease

157,000

These figures take no account of population at risk, but if exposure is taken into account, the risk of being killed through cycling is very small compared with most of the other activities cited.

Risk per lifetime (US)

 
Risk of death during lifetime
Heart disease
1 in 5
Motor vehicle accident
1 in 84
Pedestrian accident
1 in 626
Motorcycle accident
1 in 1,020
Bicycle accident
1 in 4,919

Source: National Geographic, August 2006. These statistics show the relative risk to society; no account is taken of exposure.

Risk by distance and age (NL)

Risk of injury per million km
Age group Motorists (driver) Cyclists
12 - 14
16.8
15 - 17
18.2
18 - 24
33.5
7.7
25 - 29
17.0
8.2
30 - 39
9.7
7.0
40 - 49
9.7
9.2
50 - 59
5.9
17.2
60 - 64
10.4
32.1
> 64
39.9
79.1
Total
20.8
21.0

The statistics for motorists exclude driving on motorways, where risk is very much less than on ordinary roads, for there is no comparable factor for cycling.

The average total risk is biased against cyclists because of the inclusion of two age groups (under 18 years) that do not exist in motorists; two groups, moreover, who have neither the caution nor experience of their elders.

Source: Dekoster J, Schollaert U. Cycling; the way ahead for towns and cities. European Commission DG XI. 1999.

 

See also: Assessing the actual risk faced by cyclists
  How safe is cycling? An informative quiz 

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