Among the remaining monitored 24 cases, there were 6 males over 18 females and the average age was 82± 1, 5 years old; the youngest patient was 65 years old; 19 patients were in 80 - 90 years old range, 4 cases were over 90 years old and most cases were injured in daily activities; the average monitoring duration was 6 months, the shortest monitoring period was 3 months and the longest one was 24 months.