RT info:eu-repo/semantics/article T1 Influence of obesity on bone turnover markers and fracture risk in postmenopausal women A1 López Gómez, Juan José A1 Pérez Castrillon, José Luis A1 García de Santos, Isabel María A1 Pérez Alonso, María A1 Izaola Jauregui, Olatz A1 Primo Martín, David A1 Luis Román, Daniel Antonio de K1 Bones - Diseases K1 Huesos - Enfermedades K1 Bones - Metabolism - Disorders K1 Huesos - Metabolismo, trastornos del K1 Obesity K1 Obesidad K1 Osteoporosis K1 Fractures K1 Huesos - Fracturas K1 Bone turnover markers K1 Postmenopausal women K1 Menopause K1 Menopausia K1 Nutrition K1 32 Ciencias Médicas K1 3206 Ciencias de la Nutrición AB Background and aims: The relationship between obesity and bone metabolism is controversial. In recent decades, the protective role of obesity in the development of osteoporosis is questioned. The aims of this study are the following: to evaluate the differences in bone turnover markers between postmenopausal women with and without obesity and to compare the risk of fracture at five years between these groups. Methods: An observational longitudinal prospective cohort study of postmenopausal women with obesity (O) (body mass index (BMI) > 30 kg/m2) and non-obesity (NoO) (BMI < 30 kg/m2) is designed. 250 postmenopausal women are included in the study (NoO: 124 (49.6%) and O: 126 (50.4%)). It measures epidemiological variables, dietary variables (calcium intake, vitamin D intake, smoking, alcohol consumption, and physical activity), biochemicals (β-crosslap, type I procollagen amino-terminal peptide (P1NP), 25OH-vitamin D, and parathyroid hormone (PTH)), anthropometric variables, and fracture data five years after the start of the study. The mean age is 56.17 (3.91) years. Women with obesity showed lower levels of vitamin D (O: 17.27 (7.85) ng/mL, NoO: 24.51 (9.60) ng/mL; p < 0.01), and higher levels of PTH (O: 53.24 (38.44–65.96) pg/mL, NoO: 35.24 (25.36–42.40) pg/mL; p < 0.01). Regarding the bone formation marker (P1NP), it was found to be high in women without obesity, O: 45.46 (34.39–55.16) ng/mL, NoO: 56.74 (45.34–70.74) ng/mL; p < 0.01; the bone resorption marker (β-crosslap) was found to be high in women with obesity, being significant in those older than 59 years (O: 0.39 (0.14) ng/mL, NoO 0.24 (0.09) ng/mL; p < 0.05). No differences are observed in the risk of fracture at 5 years based on BMI (OR = 0.90 (95%CI 0.30–2.72); p = 0.85). Conclusions: Postmenopausal women with obesity showed lower levels of bone formation markers; older women with obesity showed higher markers of bone resorption. PB MDPI SN 2072-6643 YR 2022 FD 2022 LK https://uvadoc.uva.es/handle/10324/62518 UL https://uvadoc.uva.es/handle/10324/62518 LA eng NO Nutrients, 2022, Vol. 14, Nº. 8, 1617 NO Producción Científica DS UVaDOC RD 14-jul-2024