Table 1. Geometric and arithmetic analyses.
| Observed (O) | Expected (E) | Variation | O/E | Statistical significance | |
|---|---|---|---|---|---|
| Mortality | 0.00% | 0.18% | − 0.18% | 0.00 | |
| Geometric LOS | 2.62 | 5.60 | − 2.98 | 0.47 | 99% confidence level |
| Geometric charge/case | $113,376 | $141,894 | $28,518 | 0.80 | 99% confidence level |
| Geometric cost/case | $39,205 | $76,160 | $36,955 | 0.51 | 99% confidence level |
| Arithmetic LOS | 2.87 | 5.75 | − 2.88 | 0.50 | 99% confidence level |
| Arithmetic charge/case | $119,660 | $152,449 | $32,789 | 0.78 | 99% confidence level |
| Arithmetic cost/case | $42,051 | $85,254 | $43,204 | 0.49 | 99% confidence level |
Abbreviation: LOS, length of stay.