Narong BunyaratavejMahidol University2018-11-232018-11-232015-01-01Journal of the Medical Association of Thailand. Vol.98, (2015), S5-S701252208012522082-s2.0-84953343834https://repository.li.mahidol.ac.th/handle/20.500.14594/36592© 2015, Medical Association of Thailand. All right reserved. The purpose of this study is to identify the lowest value of NMID osteocalcin and PINP when CTx is below or equal to 0.10 ng/ml at which neither bone formation nor bone resorption occurs. This may be harmful to bone texture. The 223 cases of CTx equal or below 0.100 ng/ml of CTx were enrolled. They consisted of 42 cases or 18.83% of menopausal women, 110 cases or 49.32% of post anti-resorptive therapy, 22 cases or 9.8% elderly and 49 cases or 21.97% unknown causes. The results show PINP = 15.88 ng/ml and NMID osteocalcin = 10.81 ng/ml. We used them as a cut value for diagnosis of bone condition. The benefits of this study: helping the physician in the treatment of bone diseases, osteoporosis in cases of over treatment; when the value of CTx is below or above 0.1 ng/ml or 0.01-0.099 ng/ml; when there is no bone resorption and osteoblastic function is poor if the values of NMID osteocalcin or PINP are still equal to 10.81, 15.88 ng/ml at any level of BetacrossLap, respectively.Mahidol UniversityMedicineArticleSCOPUS