Prevalence and associated factors of radiographic vertebral fractures in men: Rural population cross-sectional observation study in Japan

Masayuki Ichinohe, Kanichiro Wada, Gentaro Kumagai, Sunao Tanaka, Toru Asari, On Takeda, Seiya Ota, Kazushige Koyama, Kazushige Ihara, Shigeyuki Nakaji, Yasuyuki Ishibashi
Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association 2020 September 5

BACKGROUND: Osteoporotic fractures constitute a major health concern in both women and men, particularly with the aging population. Many potential risk factors of vertebral fractures (VFx) have been identified in women, but not in men. Several reports have focused on the quality of life (QOL) of clinically diagnosed VFx, but not much has been reported on quantified QOL scores of incidental radiographic VFx in men. This cross-sectional study aimed to investigate the associated factors and the influence of incident radiographic VFx on QOL of men.

METHODS: A total of 401 volunteer men aged 40 years or older (40-92 years) participated in this study. The mean age was 60.5 ± 11.8 years. Prevalent VFx were identified on the lateral lumbar spinal radiographs using the semiquantitative method. Bone mineral density, body composition, smoking, alcohol intake, past medical history, Mini-Mental State Examination, grip strength, gait speed, and biochemical markers were examined. QOL was evaluated using the 36-Item Short-Form Health Survey and the Japanese Orthopaedic Association Back Pain Evaluation Questionnaire.

RESULTS: Of the 401 subjects, 35 men (8.7%) had the prevalence of VFx. After adjustment for age, the presence of VFx was significantly associated with IGF-1 (odds ratio 0.985; p = 0.02). QOL scores were not significantly associated with VFx after adjustment for age.

CONCLUSIONS: IGF-1 is the mediator of growth hormone, and IGF-1 stimulates the proliferation, differentiation, and mineralization of osteoblastic cells. The prevalence of VFx in men was 8.7%, and IGF-1 was significantly lower in the VFx group than in the non-VFx group.

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