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. Author manuscript; available in PMC: 2016 May 1.
Published in final edited form as: J Psychiatr Res. 2015 Mar 28;64:107–113. doi: 10.1016/j.jpsychires.2015.03.017

Table 3. Model fit statistics.

Model CFI TLI RMSEA # Free
Total Sample (N=43,093) 0.985 0.979 0.012 23
 18-24y (N=5199) 0.984 0.978 0.014 23
 25-34y (N= 7759) 0.985 0.979 0.012 23
 35-44y (N=9090) 0.983 0.976 0.014 23
 45-54y (N= 7625) 0.984 0.977 0.012 23
 55-64y (N= 5215) 0.970 0.957 0.011 23
 65-75y (N=4685) 0.970 0.958 0.008 23
 >75y (N=3520) 0.981 0.973 0.013 23
Multi-group (7 age groups)
 Unconstrained model 0.981 0.973 0.012 161
 Constrained model 0.977 0.975 0.011 95

Total sample analyses modeled the seven age groups together. Multiple group analyses modeled the seven age groups simultaneously as seven separate groups.

Unconstrained models allowed each age group to have unique model parameters.

Constrained (invariant) models constrained factor loadings and thresholds to equality across age groups.

CFI: comparative fit index, TLI: Tucker-Lewis index, RMSEA: root mean squared error of approximation.

#

Free: number of freely estimated parameters.