The above analysis clearly shows a decline in the overall volume of cases assigned to CMG 55 and a corresponding increase in the volume of cases assigned to DPG 5.
A similar pattern can be shown by province. The following graph illustrates the differential shift in service setting for this procedure for selected provinces submitting 100% of their data to CIHI over this period.
For 1996/97, 66% of uncomplicated cases in the DAD assigned to CMG 55 have a length of stay (LOS) of one day (see graph below). While not all cases with a one day stay could be treated in an ambulatory setting, the impact of moving even a small percentage of these cases to day surgery could significantly lower the resources required for lens insertion procedures.
RIW can be used as an estimate of the impact of shifting even 20% (535 cases) of the cases of one day length of stay to ambulatory care based on the total number of weighted cases in these cells. By multiplying the volume of inpatient cases by the corresponding RIW value for this CMG, the number of weighted cases is calculated. These same steps are done using the DPG RIW. The resulting resource burden for 535 cases assigned to DPG 5 and CMG 55 are as follows:
Inpatient Weighted Cases: 535 x .5936 =
Ambulatory Weighted Cases: 535 x .3882 = 207.69
In relative terms, moving these patients to an ambulatory setting increases efficiency of treatment by 35%.
AcknowledgmentInformation for the Quarterly Index provided by the Canadian Institute for Health information (CIHI). For Information about CIHI or to access the Institute's publications please consult its website at www.cihi.ca. For more information regarding these statistics please contact Warren Skea at (613) 241-7860 ext. 4042, or via email at firstname.lastname@example.org.
1. Hospital utilization data are from CIHI's Discharge Abstract Database (note: partial reporting for 96/97 from Saskatchewan, Manitoba, and Prince Edward Island does not include discharges from Quebec).
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