Sukree SoontrapaChatlert PongchaiyakulWoraluk SomboonpornSuppasin SoontrapaCharoonsak SomboonpornLa Or ChailurkitKhon Kaen UniversityMahidol University2018-09-072018-09-072001-10-01Journal of the Medical Association of Thailand. Vol.84, No.SUPPL. 2 (2001)012522082-s2.0-0012145914https://repository.li.mahidol.ac.th/handle/20.500.14594/26713This study included 106 volunteer elderly women who were living in an urban area of Khon Kaen province. The mean (±SD) of age and of serum 25(OH)D concentration of these elderly women was 69.42 (±6.77) years and 33.32 (±7.14) ng/ml respectively. There was a significant inverse relationship between serum 25(OH)D and PTH concentration. Serum PTH con-centration started to increase steeply when serum 25(OH)D concentration declined ≤35 ng/ml and increased significantly when serum 25(OH)D concentration declined ≤30 ng/ml. Furthermore mean (±SD) of serum 25(OH)D concentration in the group of osteopenia and osteoporosis of femoral neck was 35.25 (±6.77) and 30.92 (±6.49) ng/ml respectively. As a result, the prevalence of hypovitaminosis D in these selected elderly women would be at least 34.9 per cent, or as high as 65.1 per cent.Mahidol UniversityMedicineArticleSCOPUS