Figure 7.1 is taken from a study to evaluate the age‐specific and gender‐specific incidence of primary shoulder dislocations in the UK. The figure shows the incidence rate of shoulder dislocation per...

Figure 7.1 is taken from a study to evaluate the age‐specific and gender‐specific incidence of primary shoulder dislocations in the UK. The figure shows the incidence rate of shoulder dislocation per 100 000 person‐years for males and females by age group. (a) Describe the general trend in the incidence rate of shoulder fractures by age for (i) males and (ii) females. (b) What are the incidence rates for males and females in the 31–40year age group? (c) Speculate on the possible causes of the difference in rates for males and females throughout.