Fig. 2

Age at first surgical procedure of patients in the Hunter Outcome Survey (HOS). Data are from patients in HOS for whom the date of the first of the specified type of operation was known (numbers of patients shown in parentheses).
Age at first surgical procedure of patients in the Hunter Outcome Survey (HOS). Data are from patients in HOS for whom the date of the first of the specified type of operation was known (numbers of patients shown in parentheses).