Table 2. Correlations Among Study Variablesa.
| Variable | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. Past-year PTSD (0 = no, 1 = yes) | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2. Current PTSD (0 = no, 1 = yes) | .56b | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 3. Age | −.18b | −.11b | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 4. Race (1 = White, 0 = non-White) | .01 | −.03c | .03c | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 5. Ethnicity (1 = Hispanic, 2 = non-Hispanic) | .01 | −.00 | .10b | .05b | NA | NA | NA | NA | NA | NA | NA | NA |
| 6. Gender (0 = male, 1 = female) | .17a | .11b | −.02 | .02 | .01 | NA | NA | NA | NA | NA | NA | NA |
| 7. Income | −.09b | −.09b | .02 | .21b | .17b | −.09b | NA | NA | NA | NA | NA | NA |
| 8. Education | −.01 | −.05b | −.13b | .13b | .12b | −.04d | .42b | NA | NA | NA | NA | NA |
| 9. Physical or sexual assault (0 = no, 1 = yes) | .30b | .23b | .03 | −.07b | .00 | .06b | −.11b | −.05b | NA | NA | NA | NA |
| 10. Other potentially traumatic events (0 = no, 1 = yes) | .16b | .14b | .06b | .07b | .03c | −.05b | .14b | .07b | .69b | NA | NA | NA |
| 11. Social support | −.17b | −.14b | −.05b | .09b | .14b | .00 | .23b | .16b | −.11b | −.12b | NA | NA |
| 12. Latency (mo since MVI) | −.03c | −.01 | −.01 | −.09b | −.09b | .01 | .05b | .02 | −.01 | −.00 | −.03c | NA |
| 13. Exposure to MVI (0 = no, 1 = yes) | .10b | .10b | −.01 | −.03c | −.05b | .06b | .05b | .01 | .05b | .04d | .00 | .07b |
Abbreviations: MVI, mass violence incident; NA, not applicable; PTSD, posttraumatic stress disorder.
a
Weighted comparisons are reported using available case analyses. Phi coefficients were calculated for relationships between dichotomous variables. Point-biserial correlations were calculated between continuous variables and dichotomous variables.
b
P < .001.
c
P < .05.
d
P < .01.