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. Author manuscript; available in PMC: 2021 Nov 1.
Published in final edited form as: J Consult Clin Psychol. 2020 Nov;88(11):1019–1031. doi: 10.1037/ccp0000608

Table 3.

Goodness-of-Fit Statistics for Longitudinal Models of Change in Study Outcomes Collapsed Across PRP T1D and Diabetes Education Groups

Type of model RMSEA CFI TLI SRMR AIC BIC SABIC SBχ2 df
Diabetes Distress (N=264)
Intercept-only 0.13 0.84 0.87 0.10 12806.23 12838.45 12809.92 143.49 26
Linear 0.08 0.94 0.95 0.08 12706.88 12749.83 12711.79 64.82 23
Quadratica 0.04 0.99 0.99 0.05 12667.10 12720.79 12673.24 29.71 20
Latent Basis 0.08 0.94 0.95 0.08 12706.15 12749.11 12711.06 64.25 23
Linear-Linear Piecewise (Knot = 12 months) 0.04 0.99 0.99 0.04 12665.98 12723.26 12672.53 27.77 19
Depressive Symptoms (N=264)
Intercept-only 0.12 0.86 0.89 0.10 10207.96 10240.18 10211.64 117.88 26
Linear 0.10 0.91 0.91 0.09 10167.07 10210.03 10171.98 85.05 23
Quadratic 0.07 0.97 0.96 0.06 10116.98 10174.26 10123.53 41.89 19
Latent Basis 0.12 0.90 0.89 0.06 10146.96 10207.81 10153.92 81.96 18
Linear-Linear Piecewise (Knot = 12 months) 0.00 1.00 1.01 0.08 10816.57 10873.85 10823.12 14.86 19
Quadratic-Linear Piecewise (Knot = 16 months) 0.03 1.00 0.99 0.03 10090.29 10165.47 10098.89 16.72 14
Glycemic Control (N=264)
Intercept-only 0.13 0.86 0.89 0.11 5099.31 5131.53 5102.99 136.73 26
Linear 0.10 0.93 0.93 0.11 5022.14 5065.10 5027.05 79.76 23
Quadratica 0.08 0.95 0.95 0.09 4988.11 5041.81 4994.25 56.61 20
Latent Basisb 0.13 0.88 0.88 0.11 5090.02 5143.72 5096.16 110.27 20
Linear-Linear Piecewise (Knot = 12 months) 0.06 0.98 0.98 0.09 4956.50 5013.77 4963.04 36.39 19
Quadratic-Linear Piecewise (Knot = 16 months) 0.06 0.98 0.98 0.04 4947.78 5022.95 4956.37 26.39 14
Blood Glucose Monitoring Frequency (with CGM used as time-varying covariate, N=264)
Intercept-Only 0.09 0.82 0.80 0.06 7341.84 7549.46 7365.57 180.95 61
Linear 0.07 0.91 0.87 0.04 7271.83 7515.25 7299.65 114.66 51
Quadratic 0.07 0.92 0.86 0.03 7253.87 7536.67 7286.20 94.55 40
Latent Basis 0.05 0.96 0.94 0.04 7200.09 7461.41 7229.96 75.20 46
Linear-Linear Piecewise (Knot = 12 months) 0.07 0.92 0.85 0.04 7275.13 7557.93 7307.46 96.52 40
Quadratic-Linear Piecewise (Knot = 16 months)b 0.05 0.96 0.93 0.03 7213.63 7500.01 7246.36 65.37 39
Diabetes Management Behaviors (N=264)
Intercept-Only 0.10 0.89 0.91 0.21 12602.72 12634.94 12606.40 92.22 26
Linear 0.06 0.97 0.97 0.15 12532.60 12575.56 12537.51 41.16 23
Quadratic 0.02 1.00 1.00 0.09 12512.54 12569.82 12519.09 21.39 19
Latent Basis 0.05 0.98 0.98 0.09 12524.11 12584.96 12531.06 28.24 18
Linear-Linear Piecewise (Knot = 12 months) 0.00 1.00 1.01 0.06 12503.32 12560.60 12509.87 14.86 19
Quadratic-Linear Piecewise (Knot = 16 months) 0.00 1.00 1.02 0.03 12500.42 12575.60 12509.02 5.97 14
Time in Range (N=252)
Intercept-Only 0.08 0.90 0.92 0.08 10335.47 10367.23 10338.70 67.47 26
Linear 0.05 0.96 0.97 0.07 10312.03 10354.38 10316.34 39.06 23
Quadratic 0.05 0.97 0.97 0.06 10312.52 10368.99 10318.27 32.01 19
Latent Basis 0.08 0.94 0.93 0.06 10316.06 10376.06 10322.17 43.89 18
Linear-Linear Piecewise (Knot = 12 months) 0.04 0.98 0.98 0.06 10307.01 10363.48 10312.76 27.18 19
Quadratic-Linear Piecewise (Knot = 16 months) 0.05 0.98 0.97 0.06 10312.95 10387.07 10320.49 23.23 14

Note. N = 264 (PRP T1D: N = 133; EI: N = 131). Adequate fit indicated by RMSEA < .08, CFI > .90, TLI > .90, SRMR < .08.

a

T7 residual variance fixed to zero.

b

Variance of the first linear factor fixed to zero.