**3. Results**

The patient demographics and characteristics are detailed in Table 1. The mean age of patients at the time of surgery was 73.6 years (range: 64.9 to 89.6 years), the mean final follow-up period was 55.1 months (range: 12.0 to 91.1 months), and the mean duration of surgery was 118.4 (range: 80.0 to 140.0) minutes.

**Variable Value** Sex (female/male) 9/4 Operated side (right/left) 6/7 Age at surgery (years) 73.6 (64.9–89.6) Time since implantation of hemiprosthesis (months) 16.7 (3.9–61.7) Follow-up period (months) 55.1 (12.0–91.1)

**Table 1.** Patient demographics and characteristics.

The values of the age at surgery, time since implantation of hemiprosthesis, and follow-up period are reported as means (ranges). Total number of patients: 13.
