Narong BunyaratavejMahidol University2018-05-032018-05-032011-10-01Journal of the Medical Association of Thailand. Vol.94, No.10 SUPPL. (2011)012522082-s2.0-84858057912https://repository.li.mahidol.ac.th/handle/20.500.14594/12286The present study showed the lowest values of bone markers from osteoblast, NMID osteocalcin, 10.81 ± 3.9 ng/ml and PINP 15.88 ± 7.09 ng/ml at lowest level of osteoclast, betaCTx, 0.066 ± 0.22 ng/ml should be the cut value for osteoblastic function. At this level betaCTx, had no correlation with PINP (r = 0.198, p = 0.003) or NMID osteocalcin (r =0.035, p = 0.606) compared to the normal value of the control group and the correlation (r) between betaCTx and NMID osteocalcin, betaCTx and PINP, which were 0.757 and 0.752 (p = 0.001) respectively and recognized as normal bone turnover with coupling effect. So, bone markers of osteoblast at the lowest value of betaCTx (0.066 ng/ml) with NMID osteocalcin, 10.81 ± 3.9 ng/ml and PINP 15.887.09 ng/ml may be the cut value of osteoblast reflecting poor functions. The benefit of identifying the cut values of osteoblast will help in making decisions in osteoporotic management.Mahidol UniversityMedicineArticleSCOPUS