Table 4.
The LOS and hospital cost for all appendicitis types and appendectomy types between LIP patients and NP patients
| Variable | Socioeconomic status | Appendicitis | Acute appendicitis | Primary appendectomy | Perforated appendicitis | Incidental appendectomy |
|---|---|---|---|---|---|---|
| Mean hospital stay ± SE (days) | LIP | 5.34 ± 0.09 | 5.15 ± 0.09 | 5.15 ± 0.09 | 8.57 ± 0.23 | 14.74 ± 0.73 |
| NP | 4.72 ± 0.01 | 4.64 ± 0.01 | 4.78 ± 0.01 | 7.46 ± 0.02 | 13.75 ± 0.07 | |
| LIP-NP ratio | 1.13 | 1.11 | 1.08 | 1.15 | 1.07 | |
| Mean hospital cost ± SE (US$) | LIP | 1,157 ± 14 | 1,133 ± 13 | 1,188 ± 15 | 1,679 ± 43 | 3,561 ± 178 |
| NP | 1,093 ± 1 | 1,081 ± 1 | 1,173 ± 2 | 1,523 ± 5 | 3,612 ± 19 | |
| LIP-NP ratio | 1.06 | 1.05 | 1.01 | 1.10 | 0.99 |
SE: standard error of the mean.
To reduce the impact of extreme data on the mean of LOS and hospital cost, we excluded 1% of maximum values and 1% of minimum values from the raw data.