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Table 5 Mean Concentration Values and Correlation Coefficients for Dose/Assay Relationship for Hair and Plasma, VPA

From: The concentration of three anti-seizure medications in hair: the effects of hair color, controlling for dose and age

Specimen VPA Mean Dose (mg/day) FPIA Mean Concentratio (mcg/g) S.D. Correlation Coefficient (r)
Hair 822.5 8.22 3.37 .717**
  VPA FPIA Mean   Correlation
Specimen Mean Concentration S.D. Coefficient
  Dose (mcg/ml)   (r)
  (mg/day)    
Serum 822.5 60.8 20.74 .128
  1. ** significant @.01, two-tailed