Table 2.
Rate per year, rate ratio and age-adjusted rate ratio for the main offence categories, by drug test result and gender.
| Men, n = 107,573 |
Women, n = 32,352 |
||||||
|---|---|---|---|---|---|---|---|
| Offence category | DTR subgroup | Rate | RR | aRR | Rate | RR | aRR |
| All offences | Dually negative | 1.378 | Ref. | Ref. | 0.632 | Ref. | Ref. |
| Cocaine only | 1.235 | 0.90 [0.89, 0.91] | 0.93 [0.92, 0.94] | 1.090 | 1.73 [1.68, 1.77] | 1.69 [1.64, 1.74] | |
| Opiate-only | 2.047 | 1.49 [1.47, 1.50] | 1.66 [1.64, 1.68] | 1.720 | 2.72 [2.65, 2.79] | 2.73 [2.66, 2.80] | |
| Opiate and cocaine | 2.164 | 1.57 [1.55, 1.59] | 1.77 [1.75, 1.79] | 2.221 | 3.51 [3.45, 3.58] | 3.46 [3.39, 3.53] | |
| Acquisitive offences | Dually negative | 0.455 | Ref. | Ref. | 0.349 | Ref. | Ref. |
| Cocaine-only | 0.372 | 0.82 [0.80, 0.83] | 0.83 [0.81, 0.85] | 0.532 | 1.52 [1.46, 1.58] | 1.49 [1.43, 1.55] | |
| Opiate-only | 0.853 | 1.87 [1.84, 1.91] | 1.95 [1.91, 1.99] | 0.876 | 2.51 [2.42, 2.60] | 2.46 [2.37, 2.55] | |
| Opiate and cocaine | 0.962 | 2.11 [2.08, 2.15] | 2.21 [2.17, 2.24] | 1.161 | 3.32 [3.24, 3.41] | 3.21 [3.13, 3.30] | |
| Serious acquisitive offences | Dually negative | 0.133 | Ref. | Ref. | 0.017 | Ref. | Ref. |
| Cocaine-only | 0.110 | 0.83 [0.80, 0.86] | 0.92 [0.89, 0.95] | 0.033 | 1.94 [1.65, 2.29] | 2.05 [1.74, 2.41] | |
| Opiate-only | 0.179 | 1.35 [1.29, 1.41] | 1.84 [1.76, 1.92] | 0.039 | 2.31 [1.95, 2.75] | 2.74 [2.30, 3.27] | |
| Opiate and cocaine | 0.208 | 1.57 [1.52, 1.62] | 2.19 [2.11, 2.27] | 0.051 | 3.02 [2.67, 3.41] | 3.63 [3.19, 4.12] | |
| Non-serious acquisitive offences | Dually negative | 0.323 | Ref. | Ref. | 0.332 | Ref. | Ref. |
| Cocaine-only | 0.262 | 0.81 [0.79, 0.83] | 0.80 [0.78, 0.82] | 0.499 | 1.50 [1.44, 1.56] | 1.46 [1.40, 1.52] | |
| Opiate-only | 0.674 | 2.09 [2.04, 2.14] | 1.98 [1.94, 2.03] | 0.836 | 2.52 [2.42, 2.61] | 2.45 [2.36, 2.54] | |
| Opiate and cocaine | 0.754 | 2.34 [2.29, 2.38] | 2.21 [2.17, 2.25] | 1.109 | 3.34 [3.25, 3.43] | 3.19 [3.11, 3.28] | |
| Non acquisitive offences | Dually negative | 0.856 | Ref. | Ref. | 0.268 | Ref. | Ref. |
| Cocaine-only | 0.780 | 0.91 [0.90, 0.92] | 0.95 [0.94, 0.96] | 0.517 | 1.93 [1.85, 2.01] | 1.89 [1.82, 1.97] | |
| Opiate-only | 1.088 | 1.27 [1.25, 1.29] | 1.47 [1.45, 1.50] | 0.779 | 2.90 [2.79, 3.02] | 2.99 [2.88, 3.12] | |
| Opiate and cocaine | 1.085 | 1.27 [1.25, 1.29] | 1.49 [1.47, 1.51] | 0.985 | 3.67 [3.56, 3.78] | 3.71 [3.60, 3.82] | |
Rate = rate of offending per person year; RR = rate ratio; aRR = rate ratio adjusted for age (counts of offences and age-covariate estimates available in Appendix C).