In the StORQS I study, only crude rates were presented (as in the example earlier) for all clinical indicators.
In another modification from StORQS I, the dimensions of the y-axes (range of rates examined) in these charts were kept constant for the four peer groups to facilitate informal intergroup comparisons.
In the StORQS study report, each hospital was provided with information about rates within their own peer group for all clinical indicators in the format of Figure 2, masked to all institution numbers except their own.
Our experience with the StORQS II study encompassed issues common to studies of interhospital variability of clinical outcomes.
The StORQS II report was released in November 1994 to all institutions with ten or more births during the 1992 study year.