Table 1:
Across non-partner violence trajectories over the two-year study, mean percentage of days of substance use, by substance, in the past 30-days at baseline, and percentage distribution by age group, gender, race, assault-related injury, PTSD, depression/anxiety, and polysubstance use at baseline (N = 599)
| Outcome | |||||||
|---|---|---|---|---|---|---|---|
| Baseline Variables | Non-violent group (or low) (group 2) (n=238, 39.7%) | Low baseline initiators (group 1) (n=35, 5.8%) | Moderate baseline persistent (Group3) (n=126, 21%) | Moderate baseline desistance (group 4) (n=108, 18%) | High baseline desistance (group 5) (n=57, 9.5%) | High baseline persistent (group 6) (n=35, 5.8%) | |
| Model 1: Past 30-Days-Substance-Use at Baseline | % of Days (SE) | % of Days (SE) | % of Days (SE) | % of Days (SE) | % of Days (SE) | % of Days (SE) | Chi-Square P Value b |
| Binge Drinking Days | 3.2% (.49) | 4.1% (1.96) | 8.2% (1.54) | 6.2% (1.42) | 10.0% (2.95) | 13.6% (3.77) | .001 |
| Cannabis Days | 45.8% (2.62) | 52.8% (7.23) | 54.3% (3.67) | 52.5% (3.87) | 58.9% (5.68) | 63.8% (6.87) | .079 |
| Illicit Drugs | 0.3% (.14) | 2.1% (1.74) | 0.6% (.40) | (.73) | 7.3% (3.93) a | 0.1% (.19) | .005 |
| Prescription Opioids | 0.7% (.38) | 0.0% (.00) | 1.6% (.88) | 0.3% (.15) | 0.5% (.42) | 0.4% (.47) | .785 |
| Prescription Sedatives | 0.5% (.21) | 2.8% (2.49) | 1.5% (.84) | 0.1% (.12) | 2.4% (1.7) | 1.5% (.86) | .304 |
| Prescription Stimulants | 0.0% (.07) | 0.0% (.00) | 0.1% (.10) | 0.0% (.00) | 0.1% (.17) | 0.8% (.85) | .088 |
| Baseline Characteristics | Count (%) | Count (%) | Count (%) | Count (%) | Count (%) | Count (%) | |
| Age14–18 vs. 19–24 c | 52 (21.8%) | 10 (28.6%) | 41 (32.5%) | 31 (28.7%) | 17 (29.3%) | 10 (28.6%) | .097 |
| Female vs. Male | 94 (39.5%) | 15 (42.9%) | 50 (39.7%) | 47 (43.5%) | 27 (46.6%) | 14 (40.0%) | .743 |
| Other Race vs. African American | 89 (37.4%) | 17 (48.6%) | 59 (46.8%) | 43 (39.8%) | 28 (48.3%) | 15 (42.9%) | .201 |
| Assault-Related Injury | 110 (46.2%) | 20 (57.1%) | 82 (65.1%) | 74 (68.5%) | 43 (74.1%) | 21 (60.0%) | < .001 |
| Baseline Mental Health | Count (%) | Count (%) | Count (%) | Count (%) | Count (%) | Count (%) | |
| Post-Traumatic Stress Disorder | 14 (5.9%) | 4 (11.4%) | 18 (14.3%) | 9 (8.3%) | 9 (15.5%) | 7 (20.0%) | .005 |
| (a) No Depression or Anxiety | 65 (27.3%) | 4 (11.4%) | 17 (13.5%) | 12 (11.1%) | 6 (10.3%) | 3 (8.6%) | |
| (b) Depression but no Anxiety | 41 (17.2%) | 6 (17.1%) | 20 (15.9%) | 9 (8.3%) | 3 (5.2%) | 4 (11.4%) | |
| (c) Anxiety but no Depression | 21 (8.8%) | 3 (8.6%) | 12 (9.5%) | 10 (9.3%) | 1 (1.7%) | 5 (14.3%) | |
| (d) Depression and Anxiety | 111 (46.6%) | 22 (62.9%) | 77 (61.1%) | 77 (71.3%) | 48 (82.8%) | 23 (65.7%) | < .001 |
| Model 2: Polysubstance Use in the Past 30-Days? | Count (%) | Count (%) | Count (%) | Count (%) | Count (%) | Count (%) | |
| Yes vs. No | 25 (10.5%) | 4 (11.4%) | 25 (19.8%) | 16 (14.8%) | 14 (24.6%) | 9 (25.7%) | .005 |
a
High-Decreasing Peer Conflict trajectory group illicit drug % of days breakdown: meth 0.0%, cocaine/crack 3.4%, heroin/street opiates 3.6%, and LSD/hallucinogens 0.1%.
b
Pearson Chi-Square tests for differences in distribution between the Low, Medium (combined), and High (combined) Peer Conflict groups.
c
Youth ages 14 – 18 were the reference group.