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. Author manuscript; available in PMC: 2017 Oct 18.
Published in final edited form as: Addiction. 2017 May 2;112(8):1378–1385. doi: 10.1111/add.13833

Table 3.

Model fit statistics

Model -2LL # Parameters AIC Compared to model p-value
1. No age regression 79,483.22 21 −754,534.80 –
2. With age regression 79,303.11 27 −754,702.90 1 3.6∙10−36
3. With age regression, common C 79,303.14 24 −754,708.90 2 0.999
4. With age regression, no C 79,304.08 21 −754,713.90 2 0.990