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Table 12 Mean Concentration Values and Correlation Coefficients for Dose/Assay Relationship for Hair and Plasma, PHT

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

Specimen PHT HPLC Hair PHT Correlation FPIA Hair Mean Correlation
  Mean Mean Coefficient PHT Concentration Coefficient
  Dose Concentration (r) [sd] (mcg/g) (r)
  (mg/day) [sd] (mcg/g)    
Hair 243.3 13.71 [7.32] .882** 13.67 [7.20] .883**
Specimen PHT HPLC Serum Correlation FPIA Serum Mean Correlation
  Mean Mean PHT Coefficient PHT Concentration Coefficient
  Dose Concentration (r) [sd] (mcg/ml) (r)
  (mg/day) [sd] (mcg/ml)    
Serum 243.3 14.00 [3.40] .779** 14.2 [3.50] .743**
  1. ** significant @.01, two-tailed