On the other hand, when reading the table horizontally one can see how the efficiency of a hospital changes from one year to another within the same window. Thus, these row views, in essence, make it possible to determine efficiency trends (i.e. whether a hospital exhibits improving, steady or deteriorating efficiency in the second year of a window against to the corresponding one in the first year). As noted in  the observation of “stability” and “trend” in window analysis reflects simultaneously both the absolute performance of a hospital over time and the relative performance of that hospital in comparison to the others in the sample. Average values of row and column values, for each section, are presented in the bottom row (labeled “common year”) and in the rightmost column (labeled “entire window”) respectively.