Table 3.
Frequency of screening and confirmation positives by drug class.
| Positive screening results | % of sample | Positive confirmation results | % of sample | |
|---|---|---|---|---|
| (N = 128) | (N = 116) | |||
| Cocaine | 13 | 1.9% | 13 | 1.9% |
| Opiates | 2 | 0.3% | 2 | 0.3% |
| PCP | 0 | 0% | – | – |
| Amphetamines | 64 | 9.2% | 59 | 8.5% |
| THCCOOH | 25 | 3.6% | 25 | 3.6% |
| Natural cannabinoids | 25 | 3.6% | 22 | 3% |
| Cannabis (either)a | 41 | 5.9% | 37 | 5.3% |
| Ethyl glucuronide | 11 | 1.6% | 9 | 1.3% |
| Cotinine | 28 | 4% | 19 | 2.7% |
| Benzodiazepines | 0 | 0% | – | – |
| Fentanyl | 0 | 0% | – | – |
Notes: Frequency of each drug class is reported; % of Sample refers to the total number of hair samples available (n = 696); 53 participants whose hair was positive for amphetamines also reported having a prescription for amphetamines; 11-nor-9-carboxy-tetrahydrocannabinol (THCCOOH) is a Δ9-tetrahydrocannabinol (THC) metabolite; Natural cannabinoids refers to phytocannabinoids (THC, cannabidiol (CBD), cannabinol (CBN), or Δ9-tetrahydrocannabivarin (THCV); no drug class is mutually exclusive; PCP phencyclidine, ETG ethyl glucuronide.
a
Cannabinoids (either) indicates a hair sample that is positive for either THCCOOH or Natural Cannabinoids or both.