The mean serum values (X ± SEM, SEM = Standard Error Mean) for c-iPTH and CT in non/hemodyalized patients.

Table 1: The mean serum values (X ± SEM, SEM = Standard Error Mean) for c-iPTH and CT in non/hemodyalized patients.

	c-iPTH (mU/mL)	CT (pmoL/L)	(r: y = ax + b) correlation
Patients not on HD (X₁)	54.15 ± 6.23	89.65 ± 19.48	(-0.14: -04.x + 107.65)
Patients on HD (X₂)	50.58 ± 5.79	31.33 ± 7.54
Patients on HD (X₂)	σ_x1-x2 (Z) = NS	Z = 3.60 SEM (p = 0.003)	(-0.32: -0.42x + 52.65)
Total	53.11 ± 4.98	62.58 ± 10.68

Z = statistical significance of the difference (σ_X1-X2) between two mean values (Z presented in SEM)). The ratio r = coefficient of correlation (interrelationship between the each value for CT and c-iPTH).