Table 3.
Factors associated with participant attrition from ReINVEST (n = 628)
| Characteristic | Attrition/person-years | Univariate analysis | Multivariate analysis | ||
|---|---|---|---|---|---|
|
Unadjusted HR (95% CI) |
P |
Adjusted HR (95% CI) |
P | ||
| Group | 0.63 | 0.50 | |||
| Placebo | 196/228 | 1.0 (ref) | 1.0 (ref) | ||
| Sertraline | 195/245 | 0.95 (0.78–1.16) | 0.93 (0.75–1.15) | ||
| Age (years) | < 0.01 | < 0.01 | |||
| - | 0.98 (0.96–0.98) | 0.97 (0.96–0.98) | |||
| Aboriginal status | 0.03 | 0.13 | |||
| Non-ATSI | 263/344 | 1.0 (ref) | 1.0 (ref) | ||
| ATSI | 126/128 | 1.25 (1.01–1.55) | 1.21 (0.95–1.55) | ||
| Relationship status | 0.85 | 0.84 | |||
| No current relationship | 229/282 | 1.0 (ref) | 1.0 (ref) | ||
| Current relationship (married/de facto) | 162/191 | 1.02 (0.83–1.25) | 1.02 (0.81–1.29) | ||
| Accommodation status | 0.44 | 0.83 | |||
| Renting/government housing | 283/325 | 1.0 (ref) | 1.0 (ref) | ||
| Own home/living with family | 79/112 | 0.85 (0.66–1.09) | 0.93 (0.71–1.22) | ||
| Insecure accommodation | 28/35 | 0.92 (0.63–1.36) | 1.05 (0.69–1.59) | ||
| Number of childrena | 0.22 | 0.79 | |||
| - | 0.97 (0.93–1.02) | 0.99 (0.94–1.05) | |||
| Education category | 0.05 | 0.03 | |||
| Did not complete School | 140/159 | 1.0 (ref) | 1.0 (ref) | ||
| School certificate | 149/146 | 1.08 (0.86–1.36) | 1.01 (0.78–1.29) | ||
| HSC/VCE/leaving certificate | 33/55 | 0.72 (0.49–1.05) | 0.58 (0.38–0.89) | ||
| Certificate, diploma, tech/trade | 61/98 | 0.78 (0.58–1.06) | 0.79 (0.57–1.10) | ||
| Degree/tertiary qualification | 6/11 | 0.60 (0.26–1.36) | 0.44 (0.16–1.22) | ||
| Educational support requiredc | 0.37 | 0.26 | |||
| No | 274/322 | 1.0 (ref) | 1.0 (ref) | ||
| Yes | 14/147 | 0.91 (0.73–1.14) | 0.87 (0.68–1.10) | ||
| Expelled from schoolc | 0.14 | 0.09 | |||
| No | 253/288 | 1.0 (ref) | 1.0 (ref) | ||
| Yes | 135/180 | 0.86 (0.69–1.06) | 0.81 (0.63–1.03) | ||
| Juvenile offending | 0.11 | 0.31 | |||
| No history of juvenile violent offending | 293/380 | 1.0 (ref) | 1.0 (ref) | ||
| History of juvenile violent offending | 42/43 | 1.17 (0.84–1.61) | 1.07 (0.74–1.55) | ||
| History of time spent in juvenile detention | 56/49 | 1.34 (1.00–1.78) | 1.29 (0.93–1.79) | ||
| Referral category | 0.04 | 0.36 | |||
| Community corrections | 166/205 | 1.0 (ref) | 1.0 (ref) | ||
| Magistrate/legal services | 191/204 | 1.17 (0.96–1.45) | 1.14 (0.89–1.47) | ||
| Self/other | 34/62 | 0.76 (0.53–1.10) | 0.89 (0.60–1.33) | ||
| Number of previous violent offencesab | 0.14 | 0.12 | |||
| - | 0.97 (0.92–1.01) | 0.91 (0.80–1.02) | |||
| Previous incarcerationb | 0.03 | 0.03 | |||
| ≤ 1 year | 353/445 | 1.0 (ref) | 1.0 (ref) | ||
| > 1 year | 38/28 | 1.46 (1.04–2.04) | 1.56 (1.05–2.31) | ||
| Psychiatric history | 0.03 | 0.03 | |||
| No admission/treatment/medication | 166/169 | 1.0 (ref) | 1.0 (ref) | ||
| ≥ 1 treatment/medication/admission | 223/302 | 0.79 (0.65–0.97) | 0.78 (0.63–0.97) | ||
| BIS Scorea | 0.16 | 0.51 | |||
| - | 0.96 (0.92–1.01) | 0.98 (0.92–1.04) | |||
| AIAQ Scorea | 0.18 | 0.23 | |||
| - | 0.98 (0.97–1.00) | 0.98 (0.96–1.01) | |||
| AUDIT Scorea | 0.53 | 0.70 | |||
| - | 1.02 (0.96–1.08) | 1.01 (0.95–1.08) | |||
| DSSI Scorea | 0.07 | 0.03 | |||
| - | 0.90 (0.81–1.00) | 0.86 (0.75–0.98) | |||
| K-10 Scorea | 0.52 | 0.73 | |||
| - | 1.02 (0.96–1.08) | 0.98 (0.91–1.07) | |||
| BDI Scorea | 0.68 | 0.38 | |||
| - | 1.01 (0.96–1.07) | 1.04 (0.96–1.12) | |||
HR hazards ratio, 95% CI 95% confidence interval. Global p-values are tests for heterogeneity excluding missing values
aAge, number of children, number of previous offences, BIS Score, AIAQ Score, AUDIT Score, Duke Score, Kessler-10 Score, and BDI Score assessed as continuous variables
bNumber of violent offences and previous incarcerations assessed within 5 years prior to randomisation
cMissing category not included. Note: No current relationship = single/separated/divorced/widowed