PMC

Six different models reflecting the metabolic syndrome: (A) one-factor model with six indicators (fit statistics χ²= 52.383 (p< 0.001); SRMR= 0.1068; CFI= 0.805; and RMSEA= 0.207); (B) one-factor model with six indicators. Because of the high correlations between TG and HDL and between SBP and DBP we allowed the residual errors to covary (fit statistics χ²= 9.160 (p 0.241); SRMR= 0.0491; CFI= 0.990; and RMSEA= 0.052); (C) one-factor model with five indicators, in which SBP and DBP are replaced by MAP (fit statistics χ²= 7.958 (p 0.093); SRMR= 0.0457; CFI= 0.976; and RMSEA= 0.094); (D) one-factor model with four indicators, in which TG and HDL are replaced by a ratio of TG/HDL (fit statistics χ²= 7.869 (p 0.020); SRMR= 0.049; CFI= 0.957; and RMSEA= 0.161); (E) four-factor model with the four conditions of the MetS as separate factors, all loading on a second-order latent factor (fit statistics χ²= 62.882 (p 0.001); SRMR= 0.0581; CFI= 0.940; and RMSEA= 0.095); and (F) four-factor model with the four conditions of the MetS as separate factors, with the factors correlating to each other (fit statistics χ²= 51.246 (p 0.007); SRMR= 0.0440; CFI= 0.958; and RMSEA= 0.082). The factor loadings shown for all models are all statistically significant with p<0.001. Model B shows the best model fit, as indicated by the lowest χ² associated p-value and SRMR and the highest CFI and RMSEA.
Abbreviations = BP: blood pressure; DBP: diastolic blood pressure; FPG: fasting plasma glucose; FPI: fasting plasma insulin; HDL: high-density lipoprotein cholesterol; IAF: CT-measured intra-abdominal fat area; IR: insulin resistance; MAP: mean arterial pressure; SBP: systolic blood pressure; SI: insulin sensitivity index; TG: triglycerides.