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Table 2 Measurements of model fit for the structure models

From: Sleep problems and functional disability in children with functional gastrointestinal disorders: An examination of the potential mediating effects of physical and emotional symptoms

Model

Chi Square Test

Baseline comparison

Departure from saturated models

Parsimony

Conclusion

χ 2

DF

P-value (NS*)

CFI (>0.9*)

RMSEA (90% CI) (<0.05*)

p-value (NS*)

1-PCFI

AIC

 

Three Major Theoretical Models

M1. Correlational model (Figure 1a)

76.4

66

0.18 NS

0.99

0.02 (0–0.04).

0.99 NS

0.38

182

Good fit

M2. Simple model (Figure 1b)

36.2

31

0.24 NS

0.99

0.02 (0–0.04)

0.93 NS

0.46

104

Good Fit

M3. Causal model (Figure 1c)

77.0

69

0.24 NS

0.99

0.02 (0–0.04)

0.99 NS

0.35

177

Good Fit

Three Extended Causal Models (Revision of M3 to further investigate association between emotional symptoms and sleep problems)

M3.1. Pruned emotional symptoms causal model (Figure 2a)

75.5

48

<0.01

0.96

0.05 (0.02-0.06)

0.64

0.41

160

Poor Fit**

M3.2. Emotional symptoms and sleep problems correlational model (Figure 2b)

75.1

69

0.29 NS

0.99

0.02 (0–0.04)

0.99 NS

0.35

175

Good Fit

M3.3. Emotional symptoms to sleep problems causal model (Figure 2c)

75.1

69

0.29 NS

0.99

0.02 (0–0.04)

0.99 NS

0.35

175

Good fit

Five Replicated Models (Using an alternative scale for functional disability)

M1 Replicate

75.1

58

0.07

0.97

0.03 (0–0.05)

0.93 NS

0.38

167

Good fit

M2 Replicate

46

33

0.06

0.94

0.04 (0–0.06)

0.78 NS

0.44

110

Good fit

M3 Replicate

89

71

0.07

0.97

0.03 (0–0.05)

0.97 NS

0.34

185

Good fit

M3.2 Replicate

89

71

0.07

0.97

0.03 (0–0.05)

0.97 NS

0.34

185

Good fit

M 3.3 Replicate

89

71

0.07

0.97

0.03 (0–0.05)

0.97 NS

0.34

185

Good fit

  1. Note. **A poor fit of M3.1 counter proves the validity of the causal model M3.