Epidemiological analysis of femoral neck fractures in patients over 60 years between middle and west areas of China from 2010 to 2011

Abstract

Objective To compare and analyze the epidemiological features of patients over 60 years with femoral neck fractures between middle and west areas of Chinafrom January 2010 to December 2011. Methods Data of patients over 60 years with femoral neck fractures treated from January 2010 to December 2011 in 44 hospitals in middle and west areas of China were collected. Patients were divided into middle group (Anhui province, Henan province, Jilin province, Hunan province, Heilongjiang province, Hubei province, Shanxi Province) and west group (The Xinjiang Uygur Autonomous Region, Sichuan province, Chongqing Municipality, Gansu province, Guangxi Zhuang Autonomous Region, Guizhou province, Tibet Autonomous Region, Ningxia Hui Autonomous Region, Qinghai province, Shanxi province, Yunan province). The gender, age, sides and fracture classification between two groups were compared and analyzed. Results A total of 3,683 cases were included, 2,067 cases in the middle group with a M/F ratio of 1:1.98 and 1,616 cases in the western group (M/F=1:1.76). Age distribution showed that the peak range was 76-80 years in middle areas and 71-75 years in western group with proportion of 24.4% and 23.5%, respectively. The high risk fracture type is 31B2 in both groups, with the proportion of 51.1% (1,056/2,067) and 48.3% (781/1,616), while the valley range was 31B1 with proportion of 21.5% (444/2,067) and 19.7%(318/1,616) respectively. There were 1,077 (52.1%) in left and 990 (47.9%) in right in middle group while 797 (49.3%) and 819 (50.7%) in western group. Conclusions The peak age is 76-80 years in middle areas and 71-75 years in west areas, the valley range was over 85 years in both groups. The high risk fracture type is 31B2. 31B1 in middle areas was higher than that in west areas and the proportion of 31B3 in middle areas was lower than western group. The middle areas had more left-side fractures and more right-side fractures in west areas. Key words: Femoral neck fractures; Epidemiology; Aged; AO Classification; Sex distribution