Abstract
Objective To investigate the fracture type, gender and age distribution of adult metacarpal fractures in Beijing, Tianjin and Hebei province. Methods From January 2010 to December 2011, the clinical data of adult patients with metacarpal fractures who had been treated in 13 hospitals in Beijing, Tianjin and Hebei province were retrospectively analyzed. The data of Beijing, Tianjin and Hebei province were divided into group A, B and C. The gender, age and fracture type of the 3 groups were compared to find out the general epidemiological characteristics. Results A total of 4 208 cases were collected, including 3 501 males (83.20%) and 707 females (16.80%), with the ratio of male to female being 4.95:1. The median age was 32 years old. The fractures predominantly occurred in an age range of 21 to 25 years, accounting for 18.20%. The difference of male to female ratio in different age groups was statistically significant (P<0.001). There were more fractures in right side than left side, accounting for 60.77%. There were 3 268 cases of single fracture (77.66%) and 940 cases of multiple fractures (22.34%) with the ratio of male to female being 5.45:1 and 3.70:1, respectively. The difference was statistically significant (P< 0.001). Type 77A2 accounted for the highest constituent ratio (20.56%, 865/4 208) in single fractures. In the three groups, the median age were 29, 31 and 33 years old with the ratio of male to female being 6.41:1, 5.24:1 and 4.68:1 respectively. The composition ratio of single fracture were 93.92%, 81.68% and 73.67% respectively. The difference was statistically significant (P< 0.05). Conclusion There are more metacarpal fractures in males than in females in Beijing, Tianjin and Hebei province. Right side and single fractures were more common. The age of high incidence of fracture is 21 to 25 years old. Compared with Hebei, the age of the adult metacarpal fractures in Beijing is smaller, the ratio of male to female is higher, and the composition ratio of single fracture is higher. Key words: Metacarpal bones; Fractures,bone; Epidemiology; Sex distribution
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