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Your search keyword '"Miyamori, Takayuki"' showing total 18 results
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18 results on '"Miyamori, Takayuki"'

4. Vitamin D levels and bone mineral density of middle-aged premenopausal female football players: A cross-sectional study

Author

Sakamoto, Kimiko, primary, Miyamori, Takayuki, additional, Someya, Yuki, additional, Nagao, Masashi, additional, Ishihara, Yoshihiko, additional, Kobayashi, Yohei, additional, Shimasaki, Yu, additional, Imai, Junko, additional, Ono, Takeshi, additional, Ikeda, Hiroshi, additional, Tashima, Kohzo, additional, and Yoshimura, Masafumi, additional

Published
2024
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17. Evaluating the Risk of a Fifth Metatarsal Stress Fracture by Measuring the Serum 25-Hydroxyvitamin D Levels

Author

Shimasaki, Yu, Nagao, Masashi, Miyamori, Takayuki, Aoba, Yukihiro, Fukushi, Norifumi, Saita, Yoshitomo, Ikeda, Hiroshi, Kim, Sung-Gon, Nozawa, Masahiko, Kaneko, Kazuo, and Yoshimura, Masafumi

Abstract

Background: The fifth metatarsal bone is a common site of stress fractures in soccer athletes. Although several endocrine risk factors for stress fractures have been proposed, the endocrine risks for fifth metatarsal (5-MT) stress fractures have not been evaluated.Methods: To evaluate the endocrine risks of fifth metatarsal stress fractures, we conducted a cumulative case-control study. The present study included 37 athletes, of which 18 had a history of a zone 2 or zone 3 fifth metatarsal stress fracture and 19 controls. We analyzed serum 25-hydroxyvitamin D (25-OHD), serum parathyroid hormone (PTH), as well as biochemical markers of bone turnover by univariate or multivariate analyses.Results: Logistic regression analyses adjusted for multiple confounders revealed that insufficient serum 25-OHD levels less than 30 ng/mL (odds ratio [OR], 23.3), higher serum PTH levels (OR, 1.01), or higher serum bone-specific isoform of alkaline phosphatase levels (OR, 1.10) rather than serum tartrate-resistant acid phosphatase 5b were associated with statistically significantly increased odds of 5-MT stress fractures. A postestimation calculation demonstrated that 25-OHD levels of 10 and 20 ng/mL were associated with 5.1 and 2.9 times greater odds for 5-MT stress fractures, respectively.Conclusion: 25-OHD insufficiency was associated with an increased incidence of 5-MT stress fractures. This insight may be useful for intervening to prevent 5-MT stress fractures.Level of Evidence: Level III, case-control study.

Published
2016
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18. Comparing Accuracy of the Final Height Prediction Models for Elite Football Players and Developing a New Model.

Author

Ando T, Nagao M, Miyamori T, Dohi M, Tateishi T, Ikeda H, and Yoshimura M

Abstract

Objective: This study aimed to assess the accuracy of previously developed height prediction models in male Japanese football players and create new height prediction models., Materials: The participants were elite academy male football players. We collected current height, parent's height, calendar age and bone age in 6 th grade of primary school and obtained actual final height at 20 to 28 years old., Methods: We compared the accuracy of two conventional models for predicting final height. These used current height, calendar age and either bone age (Model 1) or parental height (Model 2). We then developed a new model to optimize the coefficients of Model 1 (Model 3). The final model added parental height to Model 3 and optimized the coefficients (Model 4)., Results: Prediction accuracy was higher for Model 2 (R = 0.52, P < 0.001) than Model 1 (p = 0.33, P < 0.001). The equation of Model 3 was final height = 0.63229313×actual measured height-8.2541327×calendar age-2.3009853×bone age (TW2)+206.627184. The R-square was 0.49 (P < 0.0001). The equation of Model 4 was final height = 0.32156081×actual measured height - 4.6652063×calendar age+0.41903909×father's height+0.34952508×mother's height-0.740469×bone age(TW2)+62.1007751. The R-square was 0.61 (P < 0.0001)., Conclusions: In the two previous conventional models, a formula using parental height had better predictive accuracy. We developed a new height prediction model using current height, calendar age, father's and mother's height and bone age., Competing Interests: The authors have no conflict of interest to disclose., (© 2022 The Juntendo Medical Society.)

Published
2022
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