The following statement(s) is/are true concerning the epidemiology of inguinal hernias

a. Inguinal hernias occur with a male-to-female ratio of about 7:1

c. The frequency of inguinal hernias increases with age

Inguinal hernias are the most frequently occurring hernia by a factor of five over other individual types. Umbilical hernias constitute about 14% of hernias, femoral hernias about 5%, and other types are rare. There is a male prevalence in inguinal hernias of about 7:1 (male-to-female), whereas there is a female dominance in femoral and umbilical hernias of 8:1 and 7:1 (female-to-male), respectively. For inguinal hernia, which occurs at all age levels, frequency increases with age. Umbilical hernias have a bimodal distribution, peaking in the pediatric population and then in the 40 to 60 year group, in which the hernias are principally paraumbilical.