Fig. 2

Structural equation modelling (SEM) analysis for the correlation between perceived global oral and general health question and the latent factor (OHRQoL). The rectangles on the left represent perceived global oral and general health questions while the rectangles on the right represent the measured indicators of the latent factor with their variance. The uni-directional lines arising from the latent factor refer to the factor loadings of the indicators (with their standard errors). Number on these lines refer to the standardized values. The bidirectional lines refer to the correlation between perceived global oral and general health question and the latent factor (OHRQoL)