Specific measurement of PTH (1-84) in various forms of renal osteodystrophy (ROD) as assessed by bone histomorphometry

Plasma PTH measurements using either the BI-PTH or I-PTH assay effectively identify patients with reduced bone turnover and serve to distinguish this subgroup from those with high turnover lesions of renal bone disease. Both assays provide better diagnostic discrimination for this purpose than calculated values for the ratio of PTH (1-84)/amino terminally truncated PTH fragments.