Table 2.
Unadjusted odds ratios and 95% confidence interval for the relationship between a concentration above the median of the orexin (pg/mL) and demographic characteristics and history of drug use among different groups.
| Variables | Opiate group | MA* group | ||||||
|---|---|---|---|---|---|---|---|---|
| N | Median (IQR†) | P | OR (95% CI) | N | Median (IQR†) | P | OR (95% CI) | |
| Age (year) | ||||||||
| ≤35 | 119 | 58.13 (40.89–87.78) | 0.787 | 0.937 (0.585–1.501) | 78 | 42.42 (28.06–77.70) | 0.153 | 1 |
| >35 | 166 | 60.24 (39.98–103.14) | 1 | 28 | 31.90 (23.04–58.78) | 1.899 (0.788–4.577) | ||
| Regular median dosage (g/each time) | ||||||||
| ≤0.5 | 196 | 56.92 (39.20–93.73) | 0.303 | 1 | 63 | 40.47 (25.14–92.00) | 0.342 | 1 |
| >0.5 | 89 | 62.08 (41.55–95.38) | 0.768 (0.464–1.270) | 49 | 36.33 (25.96–50.81) | 1.439 (0.680–3.046) | ||
| Routes of administration at addiction phase | ||||||||
| Chasing the dragon | 181 | 55.61 (39.60–88.87) | 0.033 | 1 | 58 | 43.09 (29.56–77.70) | 0.450 | 1 |
| Injection | 79 | 74.29 (45.80–136.40) | 1.609 (0.676–3.831) | — | — | — | ||
| Others | 25 | 52.07 (36.34–74.86) | 2.904 (1.140–7.393) | 54 | 36.33 (24.50–62.00) | 0.751 (0.357–1.579) | ||
| Months of drug use | ||||||||
| ≤12 | 210 | 59.87 (40.73–94.51) | 0.610 | 1 | 36 | 43.31 (24.66–90.76) | 0.419 | 1 |
| >12 | 75 | 57.72 (40.04–92.73) | 0.872 (0.514–1.478) | 76 | 37.14 (26.44–62.37) | 1.389 (0.626–3.081) | ||
Exposure was defined as the above median concentration of orexin.
†IQR; interquartile range.
*Methamphetamine.