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Table 2 Hierarchical stepwise linear regression considering FEV1% variation as dependent variable and Nrf2, HO-1 and GCLC mRNA, plasma GSH, plasma 8-iso % variation and baseline smoking history (pack-year) as independent variables in COPD group (n.33)

From: Oxidative stress and Nrf2 expression in peripheral blood mononuclear cells derived from COPD patients: an observational longitudinal study

Independent variableStandardized Beta coefficientsP valueR2Predicted R2
FEV1% variation
 Nr2 mRNA (% variation)0.4050.001  
 HO-1 mRNA (% variation)0.3640.006  
 GCLC mRNA (% variation)0.3220.015  
 plasma 8-iso (% variation)0.0960.315  
 plasma GSH (% variation)0.0740.403