Table 3.

Stepwise multiple regression analysis of correlations between baseline explanatory variables and change in ferritin level at Week 28

Baseline explanatory variable	Regression coefficient (B) (95% confidence interval)	P-value
Ferritin	−0.544 (−0.758, −0.331)	<0.0001
ESA dosage	0.010 (0.004, 0.016)	0.001
Age	−1.940 (−3.553, −0.327)	0.019
nPCR	135.6 (21.96, 249.2)	0.020
Corrected calcium	19.51 (−2.483, 41.50)	0.082
Hemoglobin	17.68 (−2.275, 37.63)	0.082
Bodyweight	1.009 (−0.294, 2.311)	0.128