Table 4.
Fit indices for the final the structural equation model that describe the indirect effect of prenatal arsenic exposure on birth gestational age that is mediated through the main principal component of CpG methylation levels (top-ten CpGs) in the discovery phase (n = 44) .
| Index | Criterion for Good Fit | Model Fit |
|---|---|---|
| χ2 p-value | >0.05 | 0.81 |
| Root Mean Square Error of Approximation (RMSEA) | <0.05 | <0.001 |
| Comparative Fit Index (CFI) | >0.95 | 1 |
| Tucker-Lewisnon-normed Fit Index | >0.90 | 1 |
| Standardized Root Mean Squared Residual | >0.05 | 0.02 |
| Coefficient of Determination | NA | 0.54 |