Table 5: Calculated reference ranges for zinc (μmol/L) in dependence on the different feeding groups (A and B) and lactations (1 and 2).

Parametric calculationNon parametric calculation

Group A (n = 170)7–189–18
Group B (n = 172)8–208–20
Lactation 1 (n = 212)8–189–17
Lactation 2 (n = 130)8–218–20