Table 3.
Comparative interrupted time-series analysis of criminal justice costs for CRC clients and a comparison group
| Criminal justice costs | Coef. | Std. Err. | z | p > z | [95% Conf. Interval] | |
|---|---|---|---|---|---|---|
| Female (cf. male) | -17,759.22 | 2,486.07 | -7.14 | 0.000 | -22,631.83 | -12,886.62 |
| Initial difference in CRC group (cf. comparison group) | 479.28 | 3,647.64 | 0.13 | 0.895 | -6,669.96 | 7,628.52 |
| Comparison group time trend | 1,151.45 | 370.24 | 3.11 | 0.002 | 425.80 | 1,877.11 |
| Difference in CRC time trend (cf. comparison group) | 4,215.02 | 578.57 | 7.29 | 0.000 | 3,081.04 | 5,348.99 |
| Comparison group shift post index date | -26,874.35 | 5,265.85 | -5.10 | 0.000 | -37,195.23 | -16,553.47 |
| Difference in CRC shift post index date (cf. comparison group) | -3,615.81 | 13,360.85 | -0.27 | 0.787 | -29,802.58 | 22,570.97 |
| Comparison group trend change post index date | 6,159.31 | 2,177.16 | 2.83 | 0.005 | 1,892.16 | 1,0426.45 |
| Difference in CRC trend change post index date (cf. comparison group) | -9,652.28 | 6,728.67 | -1.43 | 0.151 | -22,840.24 | 3,535.68 |
Notes: Also adjusted for age, Indigenous status, complexity, any juvenile custody, and the period the intervention commenced. Costs have been annualised based on the number of days in the period. Sample size 7,144 observations for 813 individuals. The average number of observation periods per person is 9 (range from 6 to 9). Coefficients are presented in Australian dollars (2019)