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
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.
Citation: Hartemann, F., Thomas, C., Henry, C., Foret-Bruno, J. et al., "Belted or Not Belted: The Only Difference Between Two Matched Samples of 200 Car Occupants," SAE Technical Paper 770917, 1977, https://doi.org/10.4271/770917. Download Citation
F. Hartemann, C. Thomas, C. Henry, J-Y. Foret-Bruno, G. Faverjon, C. Tarrière, C. Got, A. Patel
Laboratory of Physiology and Biomechanics, Peugeot-Renault Association (France), Institute of Orthopaedical Research, Raymond Poincare Hospital (France)
21st Stapp Car Crash Conference
Twenty-First Stapp Car Crash Conference-P-073, SAE 1977 Transactions-V86-A