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. Author manuscript; available in PMC: 2014 Jan 20.
Published in final edited form as: Stat Med. 2009 Jun 15;28(13):1793–1804. doi: 10.1002/sim.3589

Table II.

Summary statistics for all 15 COPE models for four outcomes, ordered by Akaike’s Information Criterion (AIC) from best to worst. Model identifies the clustering among outcomes; Outcomes 1–4 represent Social Support= 1, Positive Action= 2, Anxiety= 3 and Somatization= 4. AIC, Bayes Information Criterion (BIC) and −2 log L are in smaller-is-better form. Diff is the −2log likelihood ratio test (LRT) statistic between each model and the saturated model 1, 2, 3, 4; df is the degrees of freedom for the test and the p-value comes from comparing the LRT statistic to the χ2(df) reference distribution. Columns labeled γ1 to γ4 are the estimates of the scale γ1s from the link function; the γ1s correspond to the outcomes in the order shown in the Model column.

Order Model AIC BIC −2 log L Diff df p-value γ1 γ2 γ3 γ4
1 134, 2 12,325.5 12,477.3 12,245.5 23.7 18 .17 .38 .88 1.00 1.00
2 1, 2, 34 12,330.6 12,520.4 12,230.6 8.8 9 .46 1.00 1.00 .87 1.00
3 13, 2, 4 12,333.7 12,523.5 12,233.7 11.9 9 .22 .48 1.00 1.00 1.00
4 14, 2, 3 12,337.8 12,527.6 12,237.8 16.0 9 .07 .37 1.00 1.00 1.00
5 1, 234 12,339.2 12,491.0 12,259.2 37.4 18 .00 1.00 .38 .90 1.00
6 1234 12,339.3 12,453.2 12,279.3 57.5 27 .00 .39 .23 .88 1.00
7 1, 2, 3, 4 12,341.8 12,569.6 12,221.8 - - - 1.00 1.00 1.00 1.00
8 13, 24 12,344.9 12,496.8 12,264.9 43.1 18 .00 .53 1.00 .35 1.00
9 12, 34 12,345.1 12,497.0 12,265.1 43.3 18 .00 1.05 1.00 .88 1.00
10 14, 23 12,346.8 12,498.6 12,266.8 45.0 18 .00 .51 1.00 .59 1.00
11 123, 4 12,347.8 12,499.7 12,267.8 46.0 18 .00 .47 .28 1.00 1.00
12 1, 23, 4 12,348.4 12,538.2 12,248.4 26.6 9 .00 1.00 .53 1.00 1.00
13 1, 24, 3 12,350.8 12,540.6 12,250.8 29.0 9 .00 1.00 .37 1.00 1.00
14 124, 3 12,351.6 12,503.4 12,271.6 49.8 18 .00 .38 .23 1.00 1.00
15 12, 3, 4 12,356.4 12,546.2 12,256.4 34.6 9 .00 1.06 1.00 1.00 1.00