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Table 3 Logistic Regression Coefficients and Model Fit Statistics

From: Evaluating a screener to quantify PTSD risk using emergency care information: a proof of concept study

Variable

Stacked Model- PDEQ Only1

Stacked Model-Adjusted2

Stratified Model-PDEQ Only3

Stratified Model- Adjusted4

Unrestricted Model- PDEQ Only5

Unrestricted Model – Adjusted6

Stacked Model – Demographics Only7

Stratified Model – Demographics Only8

Intercept

−4.22 (0.35)*

−4.64 (0.62)*

− 4.32 (0.48)*

−4.90 (0.68)*

− 3.99 (0.29)*

− 4.53 (0.52)*

−1.79 (0.44)*

−1.80 (0.49)*

PDEQ

0.15 (0.02)*

0.16 (0.02)*

0.16 (0.02)*

0.16 (0.02)*

0.13 (0.01)*

0.13 (0.01)*

  

Age

 

−0.02 (0.008)

 

−0.01 (0.01)

 

− 0.01 (0.01)

−0.02 (0.007)*

− 0.01 (0.008)

Sex9

 

0.53 (0.23)*

 

0.52 (0.23)*

 

0.44 (0.19)

0.74 (0.21)*

0.72 (0.21)*

Current Trauma

 MVA

 

Reference:

 

Reference

 

Reference

Reference

Reference

 Non-interpersonal

 

−0.83 (0.39)*

 

−0.66 (0.40)

 

−0.53 (0.32)

−0.55 (0.35)

− 0.39 (0.37)*

 Interpersonal

 

0.80 (0.42)

 

0.86 (0.43)*

 

0.87 (0.34)*

1.21 (0.38)*

1.15 (0.40)*

Prior trauma

 No prior trauma

 

Reference

 

Reference

 

Reference

Reference

Reference

 Non-interpersonal

 

0.37 (0.44)

 

0.34 (0.45)

 

0.63 (0.37)

0.30 (0.40)

0.29 (0.41)

 Interpersonal

 

1.01 (0.42)*

 

0.95 (0.43)*

 

1.03 (0.35)*

0.96 (0.38)*

0.90 (0.39)*

Data Source

 Shalev et al., 2008 [29]

  

Reference

Reference

   

Reference

 Shalev et al., 2000 [28]

  

0.66 (0.36)

0.37 (0.38)

   

0.16 (0.34)

 Irish et al., 2008 [26]

  

0.22 (0.37)

0.27 (0.39)

   

−0.20 (0.36)

 van Zuiden et al., 2017 [30]

  

−0.44 (0.35)

−0.23 (0.39)

   

−0.55 (0.35)

 Mouthaan et al., 2014 [37]

  

0.08 (0.47)

0.04 (0.51)

   

−0.07 (0.47)

Model Fit Statistics

 AUC

0.77

0.81

0.78

0.81

0.75

0.78

0.69

0.70

 Brier Score

0.13

0.13

0.13

0.13

0.13

0.13

0.15

0.15

 Brier Skill Score

0.17

0.22

0.20

0.22

0.12

0.15

0.08

0.09

 Calibration Slope

1.007

0.941

0.966

0.908

1.004

0.946

0.903

0.836

  1. * p < 0.05. All regression coefficients are reported as b (SE)
  2. Abbreviations: PDEQ peri-traumatic dissociative experiences questionnaire, MVA motor vehicle accident, AUC area under the receiver-operating curve
  3. 1 Stacked model with PDEQ only
  4. 2 Stacked model adjusted for age, gender, trauma type, and prior trauma
  5. 3 Stratified model with PDEQ only
  6. 4 Stratified model adjusted for age, gender, trauma type, and prior trauma
  7. 5 Unrestricted model with PDEQ only
  8. 6 Unrestricted model adjusted for age, gender, trauma type, and prior trauma
  9. 7 Stacked model with demographic variables (i.e., age, sex, mechanism of injury, prior trauma history) only
  10. 8 Stratified model with demographic variables (i.e., age, sex, mechanism of injury, prior trauma history) only
  11. 9 Male is the reference group
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BMC Emergency Medicine

ISSN: 1471-227X

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