Table 2.
Information-theoretic model selection results of all considered multinomial logit models for predicting the types of sleep-wake disturbance (Type). Predictor variables were the age in years at initial TBI (Age), Gender, severity of initial TBI (Severity), the total number of TBIs prior to the onset of sleep-wake disturbances (TBIs), and the time (months) to onset of sleep-wake disturbances (Onset).
Model | K a | Log-Lik b | AICc c | ΔAICc d | Wt e |
---|---|---|---|---|---|
Type ~ Age | 10 | −299.52 | 620.16 | 0.00 | 0.55 |
Type ~ Age + Onset | 15 | −294.99 | 622.49 | 2.33 | 0.17 |
Type ~ Age + TBIs | 15 | −295.09 | 622.68 | 2.52 | 0.16 |
Type ~ Age + Onset + TBIs | 20 | −289.56 | 623.64 | 3.48 | 0.10 |
Type ~ Age + Gender | 15 | −297.77 | 628.05 | 7.89 | 0.01 |
Type ~ Age + Gender + TBIs | 20 | −293.24 | 630.99 | 10.83 | 0.00 |
Type ~ Age + Gender + Onset | 20 | −293.42 | 631.35 | 11.19 | 0.00 |
Type ~ Age + Severity | 20 | −293.58 | 631.68 | 11.52 | 0.00 |
Type ~ Age + Gender + Onset + TBIs | 25 | −287.63 | 632.45 | 12.29 | 0.00 |
Type ~ Age + Severity + Onset | 25 | −289.23 | 635.63 | 15.47 | 0.00 |
Type ~ Age + Severity + TBIs | 25 | −290.17 | 637.53 | 17.37 | 0.00 |
Type ~ Onset | 10 | −308.93 | 638.98 | 18.82 | 0.00 |
Type ~ Onset + TBIs | 15 | −303.91 | 640.32 | 20.16 | 0.00 |
Type ~ 1 | 5 | −315.11 | 640.52 | 20.36 | 0.00 |
Type ~ Age + Severity + Onset + TBIs | 30 | −285.09 | 640.75 | 20.59 | 0.00 |
Type ~ Age + Severity + Gender | 25 | −291.88 | 640.94 | 20.78 | 0.00 |
Type ~ TBIs | 10 | −311.00 | 643.12 | 22.96 | 0.00 |
Type ~ Age + Severity + Gender + Onset | 30 | −287.74 | 646.04 | 25.88 | 0.00 |
Type ~ Gender + Onset | 15 | −307.14 | 646.80 | 26.64 | 0.00 |
Type ~ Age + Severity + Gender + TBIs | 30 | −288.29 | 647.15 | 26.99 | 0.00 |
Type ~ Gender | 10 | −313.07 | 647.26 | 27.10 | 0.00 |
Type ~ Severity + Onset | 20 | −301.42 | 647.36 | 27.20 | 0.00 |
Type ~ Severity | 15 | −307.61 | 647.74 | 27.58 | 0.00 |
Type ~ Gender + Onset + TBIs | 20 | −301.78 | 648.08 | 27.92 | 0.00 |
Type ~ Gender + TBIs | 15 | −308.90 | 650.31 | 30.15 | 0.00 |
Type ~ Age + Severity + Gender + Onset + TBIs | 35 | −283.22 | 651.17 | 31.01 | 0.00 |
Type ~ Severity + Onset + TBIs | 25 | −297.41 | 651.99 | 31.83 | 0.00 |
Type ~ Severity + TBIs | 20 | −304.52 | 653.55 | 33.39 | 0.00 |
Type ~ Severity + Gender | 20 | −305.70 | 655.91 | 35.75 | 0.00 |
Type ~ Severity + Gender + Onset | 25 | −299.83 | 656.84 | 36.68 | 0.00 |
Type ~ Severity + Gender + Onset + TBIs | 30 | −295.45 | 661.47 | 41.31 | 0.00 |
Type ~ Severity + Gender + TBIs | 25 | −302.49 | 672.16 | 52.00 | 0.00 |
a Number of model parameters. b log-likelihood of model. c Akaike’s Information Criterion (AIC) corrected for small sample size. d Difference between AICc of model and AICc of top-ranked model. e Model weight.