MCA was applied to determine the major axes summarizing more clearly data [22]. This method gives a set of coordinates of the categories of variables, and thus reveals the relationships between the individuals and the different categories. Each principal component was interpreted in terms of amount of contribution for each category to variance of axis. The contribution of a variable was statistically significant when its mean was greater than 1/p, (p = number of categories of variables). Graphical evaluation was built using the major components in a series of two-dimensional graphs.