Samenvatting
The use of safety belts reduces the change to be injured or killed in an accident. It has been proven in laboratories by impact tests. To determine the effectivety of safety belts in real terms before- and- after comparisons are made with adjustments for other influences. It seems probable that earlier estimates of the effectivity of belts (60%- 80%) have to be adjusted downward. An opponent remark is presented by R.Kühner.