A multi-center epidemiological investigation of adult femoral neck fractures from 2010 through 2011 in Hebei Province

Abstract

Objective To investigate the epidemiological features of adult femoral neck fractures in Hebei Province. Methods The epidemiological survey was conducted in 3 orthopaedic hospitals at 3 regions in Hebei Province [The Third Affiliated Hospital to Hebei Medical University at Shijiazhuang (Group A), Cangzhou No.2 Hospital at Cangzhou (Group B) and The Second Hospital of Tangshan at Tangshan (Group C) ]. The data of adult fractures treated between 2010 January to 2011 December at the 3 hospitals were collected through the PACS system. Adult femoral neck fractures were analyzed in terms of classification, gender, age and Garden fracture type. Comparisons between the 3 groups were made. Results A total of 2, 825 adult femoral neck fractures were treated, accounting for 50.50% of the proximal femoral fractures and 3.85% of all the adult fractures at the same period. The ratio of male to female was 0.76: 1. The peak age of femoral neck fracture was ≥ 66 years (48.74%) and the predominant type was Garden type Ⅲ (56.18%). There were 898, 602 and 1,325 adult femoral neck fractures respectively in groups A, B and G. The peak ages of femoral neck fracture in the 3 groups were all ≥ 66 years, but there were significant differences between the 3 groups (56.35% for group A versus 49.83% for group B versus 43.09% for group C) (P<0.05). The proportions of femoral neck fractures in the contemporary proximal femoral fractures in groups A and C were significantly higher than in group B (P<0.05). As for the proportion of femoral neck fractures in the contemporary adult fractures, group B<group A<group G (P<0.05). Garden type Ⅲ was the predominant type in all the 3 groups. The proportion of displaced fractures in group A (63.47%) was significantly smaller than that in group B (75.58%) and in group C (72.53%) (P<0.05). Conclusions More adult women suffered from femoral neck fracture than adult men in Hebei Province. The victims were mostly old people. Garden type Ⅲ was predominant. The proportion of femoral neck fractures in the proximal femoral fractures was the highest in Shijiazhuang. The proportion of femoral neck fractures in all the adult fractures was the highest in Tangshan. The proportion of the elderly patients was the highest in Shijiazhuang. There were no statistically significant differences regarding gender between the 3 regions. Key words: Femoral neck fractures; Epidemiology; Multicenter studies; Adult