The construct validity was evaluated by factor analysis method. An exploratory factor analysis, using principal components analysis with varimax rotation was performed.Criterion validity was addressed by determining the correlation between two global measures of satisfaction and each of the 18 items. The measurement properties of the potential factors were investigated by determining correlations of the factors to the global measures and 10-cm Visual Analog Scale (VAS) which evaluates the level of patient satisfaction with higher scores indicating better satisfaction. Pearson correlation coefficient was used to assess the strength of the linear relationships. Test-retest reliability was examined by calculating the Intraclass Correlation Coefficient (ICC). Internal consistency relates to homogeneity of an instrument, which is assessed with Cronbach's alpha