[Pitfalls of statistics as shown in a study on dysplastic hips (author's transl)]

In 97 cases of randomly selected children of an age from 5 to 16 weeks the angles of Hilgenreiner are determined. In relation to these findings also the influence of various factors such as hereditary anamnesis and untimely birth are observed. The so found data are compared with those published from Tönnis and Brunken. It seems that their data are higher than those in an average population. The necessity of an exact random test is pointed out.