Characteristics, n (%) | Period 1, N = 518 (50%) | Period 2, N = 507 (49%) | P-value |
---|---|---|---|
Drugs | |||
 Cocaine | 32 (6%) | 27 (5%) | 0.56 |
 Opiates | 130 (25%) | 122 (24%) | 0.70 |
 Benzodiazepines | 78 (15%) | 75 (15%) | 0.91 |
 Barbiturates | 8 (2%) | 4 (0.8%) | 0.26 |
 THC | 154 (30%) | 161 (32%) | 0.48 |
 Methamphetamine | 9 (2%) | 1 (0.2%) | 0.02 |
 Amphetamines | 64 (12%) | 67 (13%) | 0.68 |
 Ecstasy | 15 (6%) | 10 (4%) | 0.24 |
 PCP | 16 (3%) | 17 (3%) | 0.95 |
Number of drugs, median (IQR), range | 1 (0–2), (0–5) | 1 (0–2), (0–4) | 0.65 |
BAC levels (mg/dL) | Â | Â | 0.17 |
  < 10 | 237 (46%) | 203 (40%) |  |
 10–79 | 64 (12%) | 78 (15%) |  |
 80–99 | 13 (3%) | 12 (2%) |  |
 100–199 | 99 (19%) | 88 (17%) |  |
  ≥ 200 | 105 (20%) | 126 (25%) |  |