Table 3.

Fixed-effect Model for Predictors of Change in Akron PES from Baseline

Effect	Estimate	S.E.	t-value	p-value
Intercept	−1.773	6.554	−0.27	0.79
Drug sequence	1.459	0.839	1.74	0.10
Period	−0.365	0.624	−0.58	0.56
Ferrous sulfate	−0.738	0.684	−1.08	0.29
Antibiotic use	1.585	0.731	2.17	0.04
FEV1 (% predicted)	−0.021	0.046	−0.46	0.65
Serum iron (µg/dl)*	0.995	0.901	1.10	0.28
Serum hepcidin-25 (ng/ml)	0.042	0.014	2.98	0.006
Reticulocyte count (%)	0.781	0.975	0.80	0.43
Body weight (kg)	−0.424	0.206	−2.06	0.047
Hemoglobin (gm/dl)	−0.929	0.469	−1.98	0.06
Sputum iron (ng/mg)*	−0.244	0.499	−0.49	0.63

S.E. = standard error

^*Log-transformed prior to introduction into model.