Table 2.
Multiple Linear Regression in Which Factors Were Entered in Hierarchical Blocks Predicting Posttraumatic Stress (PCL Raw Total Scores): Standardized Regression Coefficients (βs)
| Predictor variable | Block 1 R2 = .041** | Block 2 R2 = .083*** RΔ2 = .043** | Block 3 R2 = .326*** RΔ2 = .243*** |
|---|---|---|---|
| Block 1: Ethnoracial group | |||
| African American | .17** | .17** | .12* |
| American Indian | .10† | .09† | .03 |
| Latino | −.06 | −.05 | −.04 |
| Asian | .03 | .04 | .04 |
| Block 2: Sociodemographic and insurance predictors | |||
| Household income | −.07 | −.02 | |
| Education (years) | −.10 | −.01 | |
| Age (years) | .03 | −.06 | |
| Gender: % female | .18*** | .13** | |
| Insured? % yes | .01 | .03 | |
| Block 3 | |||
| Pretrauma and index trauma factors | |||
| Injury severity | .14** | ||
| Admission event type (% intentional) | .18*** | ||
| Total # of past traumas | .20*** | ||
| Probable prior PTSD? % yes | .24*** | ||
| Total # preexisting medical problems | .05 | ||
| Substance use (% positive) | |||
| Alcohol: BAC | .00 | ||
| Alcohol: AUDIT-C | −.06 | ||
| Tobacco | .04 | ||
| Marijuana | −.02 | ||
| Cocaine | .08 | ||
| Amphetamines | .11* | ||
| Opiates | −.04 | ||
| Other drugs | .01 |
Note. PCL-C = Posttraumatic Stress Disorder Checklist-Civilian Version; PTSD = posttraumatic stress disorder; BAC = blood alcohol concentration; AUDIT-C = Alcohol Use Disorders Identification Test.
†
p < .10.
*
p < .05.
**
p < .01.
***
p < .001.