Table 5.
Subgroup analysis with a multiple linear regression analysis to compare the differences in hospital costs (USD) and LOS (days) between LIP and NP patients
| Stratified variables | Hospital cost (USD) | LOS (days) | ||||
|---|---|---|---|---|---|---|
| SES (LIP versus NP) | SES (LIP versus NP) | |||||
| Coefficient | SE | P | Coefficient | SE | P | |
| Gender | ||||||
| Male | 37 | 13 | 0.004 | 0.57 | 0.09 | < 0.001 |
| Female | 96 | 14 | < 0.001 | 0.19 | 0.08 | 0.013 |
| Age (years) | ||||||
| 0–14 y/o | −40 | 18 | 0.031 | −0.20 | 0.12 | 0.086 |
| 15–29 y/o | 45 | 11 | < 0.001 | 0.02 | 0.07 | 0.819 |
| 30–44 y/o | 144 | 17 | < 0.001 | 0.34 | 0.06 | < 0.001 |
| 45–59 y/o | 274 | 31 | < 0.001 | 1.39 | 0.19 | < 0.001 |
| 60 y/o or more | 234 | 48 | < 0.001 | 1.83 | 0.26 | < 0.001 |
| Perforated appendicitis | ||||||
| No | 37 | 8 | < 0.001 | 0.26 | 0.05 | < 0.001 |
| Yes | 133 | 25 | < 0.001 | 0.68 | 0.15 | < 0.001 |
A multivariate analysis was conducted after adjusting for age, gender, hospital level, and comorbidities
LIP low-income population NP normal population SE standard error