Figure 2. Passing-Bablock graphic present linear relationship between the two different methods used to determine concentrations of bone isoenzyme of alkaline phosphatase (electrophoresis technique, bALP, U/L and immunoassay method, OSTASE, U/L).

Three different dot shapes and colours present three subgroups of measured isoenzyme concentrations according to the specified cut-off values of < 27 U/L, 27–53 U/L and ≥ 53 U/L for low, normal and high bone turnover, respectively