Belted or Not Belted: The Only Difference Between Two Matched Samples of 200 Car Occupants

F. Hartemann; C. Thomas; C. Henry; J-Y. Foret-Bruno; G. Faverjon; C. Tarrière; C. Got; A. Patel

doi:10.4271/770917

1977-02-01

Belted or Not Belted: The Only Difference Between Two Matched Samples of 200 Car Occupants 770917

This study aims at determining, with the maximum precision, the performance of the 3 point safety belt in different accident configurations, and more particularly in frontal collisions.

For this purpose, two matched samples were taken from a file of 3000 accidents, analysed by a multidisciplinary study group. These samples of 100 front seat occupants wearing seat belts, and 100 not wearing seat belts were made up in such a manner that, for every belted occupant, corresponds an occupant not wearing a belt, the one and the other being in equivalent circumstances, using the following factors:

Make and type of the vehicle
Seat occupied
Age (as far as possible)
Direction of impact
Violence of the impact (same class of ▵V and mean γ)
Possible intrusion of passenger compartment
Possible overload caused by a rear seat occupant

Using this method of comparison, one can appreciate the effectiveness of the 3 point belt and explain the variations of effectiveness that appear in normal case studies.

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Belted or Not Belted: The Only Difference Between Two Matched Samples of 200 Car Occupants 770917

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