Abstract
SummaryIn Kyoto Prefecture, Japan, the number of hip fractures increased during 2013–2017 compared to 2008–2012. However, the estimated overall incidence rate increased only in femoral neck fractures in men aged ≥75 and women aged ≥85.PurposeThe incidence rate of hip fractures in Japan has plateaued or decreased. We investigated the annual hip fracture occurrences in Kyoto Prefecture, Japan, from 2008 to 2017.MethodsPatients aged 65 years and above who sustained hip fractures between 2008 and 2017 and were treated at one of the participating 11 hospitals were included. The total number of beds in these institutions was 3701, accounting for 21.5% of the 17,242 acute-care beds in Kyoto Prefecture. The change in incidence rate was estimated utilizing the population according to the national census conducted in 2010 and 2015.ResultsThe total number of hip fractures was 10,060, with 47.5% femoral neck fractures and 52.5% trochanteric fractures. A decrease in number was seen only in trochanteric fractures in the group of 75- to 84-year-old women. The population-adjusted numbers of femoral neck fractures showed a significant increase in all age groups in men, whereas in women, there was an increase in femoral neck fractures in the ≥85 group and trochanteric fractures in the age group 65–74, and a decrease in trochanteric fractures in the age group 75–84. The estimated change in incidence rate showed an increase in femoral neck fractures in men aged ≥75 and women aged ≥85.ConclusionIn Kyoto Prefecture, the number of hip fractures increased in the second half of the study period (2013–2017) compared to the first half (2008–2012). However, the incidence rate had not increased, except in femoral neck fractures in men aged ≥75 and women aged ≥85.
Highlights
The number of hip fractures continues to grow in Japan with the aging population
We investigated the annual hip fracture occurrences in Kyoto Prefecture, Japan, from 2008 to 2017
The change in incidence rate was estimated utilizing the population according to the national census conducted in 2010 and 2015
Summary
The number of hip fractures continues to grow in Japan with the aging population. the incidence rate has been reported to have slowed down in growth and decreased in bothKyoto Prefectural University of Medicine, Kyoto, Japan 3 Department of Rehabilitation Medicine, Graduate School of MedicalScience, Kyoto Prefectural University of Medicine, Kyoto, Japan 4 Department of Epidemiology for Community Health and Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan men and women aged 70–79 years [1]. The incidence rate has been reported to have slowed down in growth and decreased in both. Kyoto Prefectural University of Medicine, Kyoto, Japan 3 Department of Rehabilitation Medicine, Graduate School of Medical. Kyoto Prefectural University of Medicine, Kyoto, Japan 4 Department of Epidemiology for Community Health and Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan men and women aged 70–79 years [1]. A decrease in the incidence rate of hip fractures has been noted in many Western countries. Hip fractures can be divided into femoral neck fractures which are intraarticular and trochanteric fractures which are extraarticular. Hagino et al [3] reported a recent increase in the ratio of patients with femoral neck fractures to those with trochanteric fractures (the N/T ratio)
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