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. Author manuscript; available in PMC: 2018 Oct 31.
Published in final edited form as: Violence Vict. 2017 May 17;32(4):642–657. doi: 10.1891/0886-6708.VV-D-16-00045

Table 2.

Negative binomial hurdle model estimates for all parameters predicting total PTSD sum score.

b (SE) R2
Hurdle sub-model
  Intercept 0.023 (0.517)
  Any intoxication 2.572 (1.263)*
  Level of intoxication −0.081 (0.528)
  Coercion severity 2.007 (0.793)*
.1536
Count sub-model
  Intercept 2.655 (0.171)**
  Any intoxication −0.020 (0.252)
  Level of any intoxication
    At 1 −0.676 (0.366)
    At 2 −0.109 (0.154)
    At 3 0.458 (0.143)**
    At 4 1.026 (0.353)**
  Level of any intoxication squared 0.284 (0.116)*
  Coercion severity 0.376 (0.157)*
.1166
Scale 0.665 (0.106)**
**

Note: p < .01.

*

p < .05.

SE = Standard Error. Estimates (b) for the hurdle sub-model predict the logit of no symptoms while estimates for the count sub-model predict the log of the count.