HIP FRACTURE EPIDEMIOLOGY IN AGE-GROUPS O F HIGH OSTEOPOROSIS RISK

In accordance with the program on osteoporosis epidemiology in subject s over 50, a retrospective study of hip fracture incidence in populati ons of two Russian towns (Elektrostal and Yaroslavl) was performed. Th e total population of Electrostal and Yaroslavl is above 100000 and 60 0000, respectively. The analysis of medical records of the traumatolog ical departments of the central city hospitals where patients with hip fractures have been admitted and files from outpatient traumatologica l stations was performed for 1986-1991 and 1982-1991. The towns' admin istration provided statistical data on relevant population number and age distribution. Hip fracture has been defined as a fracture of the f emoral neck or intertrochanteric region fracture (ICD 9 code 820.0 and 820.2). The incidence of hip fracture for the examined period for the town of Elektrostal made up 61/100000 person-years (32 males and 77 f emales) and for the town of Yaroslavl 61/100000 person-years (45 males and 70 females). Male/female ratio was 1:2 and 1:1.5, respectively. T he occurrence of hip fractures was maximal in subjects over 75 years o ld. More recent data showed no significant differences in the incidenc e of hip fractures in tire two towns, except a significant rise in hip fracture incidence in female residents of Yaroslavl. Compared to Euro pean countries, the incidence of hip fractures in tire above towns was significantly lower. The reasons of these differences are unclear and need further investigation.