The validity of hair analysis for detecting cocaine and heroin use among addicts.

@article{Magura1992TheVO,
  title={The validity of hair analysis for detecting cocaine and heroin use among addicts.},
  author={Stephen Magura and R. C. Freeman and Q Siddiqi and Douglas S. Lipton},
  journal={The International journal of the addictions},
  year={1992},
  volume={27 1},
  pages={51-69}
}
Radioimmunoassay of hair (RIAH) was compared with two criterion measures, confidential EMIT urinalysis and self-reporting of cocaine/heroin use, for a purposive sample of 134 persons in methadone treatment. Positive or negative RIAH was "confirmed" by urinalysis and/or self-report in 87 and 84% of the cases for cocaine and heroin (morphine), respectively. Corroborative evidence indicated that "excess" RIAH positives were attributable to the narrow window of detection for urinalysis (2 days… CONTINUE READING