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. Author manuscript; available in PMC: 2012 Apr 1.
Published in final edited form as: Soc Sci Med. 2011 Mar 8;72(8):1400–1408. doi: 10.1016/j.socscimed.2011.02.022

Table 6.

Results of Multinomial Logistic Regressions Predicting PTSD Latent Class Membership

Variable −2 log
likelihood
χ2(2) Class 1: Moderate-improving
Class 2: Severe-improving
Class 3:
Severe
Chronic
M Exp(B) 95%
confidence
interval for
Exp(B)
M Exp(B) 95%
Confidence
interval for
Exp(B)
Reference
Category
M
Intercept 587.99 24.12** B: 0.11 B: -13.61
Sex: women 568.40 4.52 52.6 0.61* 0.38, 0.99 33.0 0.98 0.22, 4.37 52.4
Age 579.72 15.84** 33.9 0.96** 0.95, 0.98 41.3 0.99 0.93, 1.07 38.9
Income 566.99 3.11 1.8 1.32 0.96, 1.82 1.6 1.07 0.43, 2.65 1.5
Education 568.66 4.78 2.3 1.25 0.99, 1.58 2.2 1.81 0.85, 3.87 1.9
Married 565.15 1.27 67.0 1.02 0.61, 1.73 81.0 3.50 0.35, 35.4 74.0
Exposure to political violence (T1) 584.15 20.28** 2.3 0.91** 0.86, 0.96 7.6 0.93** 0.89, 0.98 6.3
Exposure to political violence (T2) 565.58 1.71 1.6 0.96 0.89, 1.02 2.3 0.97 0.80, 1.17 4.5
Exposure to political violence (T3) 579.50 15.62** 0.2 0.83* 0.68, 1.00 0.7 2.30** 1.31, 4.02 0.7
Psychosocial resource loss (T1) 828.19 264.31** 9.4 1.38** 1.29, 1.47 22.9 2.59** 1.97, 3.40 6.4
Psychosocial resource loss (T2) 599.19 35.31** 6.6 0.88** 0.84, 0.92 7.0 0.85** 0.76, 0.95 10.1
Psychosocial resource loss (T3) 614.46 50.59** 6.4 0.89** 0.85, 0.93 6.9 0.65** 0.55, 0.78 9.8
Social support (T1) 590.88 26.99** 4.5 1.38** 1.19, 1.60 3.2 0.80 0.53, 1.20 3.7
Social support (T2) 565.14 1.27 4.4 1.01 0.87, 1.18 4.4 0.78 0.49, 1.26 4.0
Social support (T3) 566.47 2.59 4.4 1.13 0.97, 1.32 4.3 1.06 0.66, 1.69 3.9

Note. The χ2 indicates the difference between the −2 log likelihoods of the full model and the model is this independent variable was omitted. Exp(B) indicates that the odds ratio of being in the class as opposed to the reference category as a function of a one-unit increase of the independent variable. Means are reported for all variables save for sex, and married, which are expressed in percentages.

*

p < .05.

**

p < .001.