核心概念
Cannabinoid confirmatory testing in children may yield false negatives due to reporting threshold changes.
統計資料
"The false-positive rate was 10.1% based on the 15 ng/mL threshold compared with 2% based on the 5 ng/mL limit of quantification."
"About 81% of samples with negative LC-MS reports had detectable concentrations of THC-COOH."
引述
"Confirming THC-COOH in children's and adolescents' urine may be relevant at concentrations less than 15 ng/mL, particularly if child protection is pertinent."
"Confirmatory testing should be reserved for select cases and must be interpreted with caution. Laboratories should report down to the limit of quantification on request."