Figure 1. Multivariable analysis of severe oligozoospermia, aberrant methylation and related factors using structural equation modeling.

Model results in good overall fit (χ²(16) = 10.546 (p = 0.837), GFI = 0.971, AGFI = 0.934, CFI = 1.000, RMSEA = 0.0001). Standardized coefficients are shown above the arrows. Coefficients of determination are shown at the upper right of each factor (severe oligozoospermia abberant methylation, total PCB concentrations and habitual exercise). ^†P < 0.10, *P < 0.05, **P < 0.01.