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Table 4 Progressively fitted models for serum ORAC with p values (hierarchical method) [male smokers excluded].

From: A forced titration study of the antioxidant and immunomodulatory effects of Ambrotose AO supplement

Effect df Model 1 Model 2 Model 3
Intercept 1 0.000 0.000 0.000
Group 1 0.206 0.096  
Linear dose 1 0.158 0.153 0.135
Quadratic dose 1 0.047 0.045 0.047
Linear dose * Group 1 0.210   
Quadratic dose * Group 1 0.959