Table 2.
Subgroup analyses with respect to in-system status and age
| Variable | Elective admission | Unplanned admission | p value |
|---|---|---|---|
| In-system patients (N = 357) |
In-system patients (N = 16) |
||
| Age* (years) | 59 (51–66) | 64 (49.8–70) | 0.52 |
| Private insurance† | 36% (129) | 13% (2) | 0.05 |
| Major severity on admission‡ | 15% (52) | 19% (3) | 0.72 |
| Blood transfusion required‡ | 23% (82) | 44% (7) | 0.07 |
| Length of stay* (days) | 3 (3–4) | 4 (3–5.8) | 0.007 |
| Total cost observed* (USD) | 14,626 (13,510–16,297) | 16,866 (14,476–19,689) | 0.06 |
| Patients 65 and older (N = 116) |
Patients 65 and older (N = 27) |
||
|---|---|---|---|
| Age* (years) | 70.5 (67–76.3) | 74 (68–80.5) | 0.21 |
| Private insurance‡ | 14% (16) | 7% (2) | 0.52 |
| Major severity on admission† | 22% (26) | 26% (7) | 0.7 |
| Blood transfusion required† | 32% (37) | 44% (12) | 0.22 |
| Length of stay* (days) | 3 (3–4) | 6 (5–9.5) | < 0.0001 |
| Total cost observed* (USD) | 14,834 (13,548–17,895) | 18,206 (14,998–24,876) | 0.007 |
* Mann-Whitney U test expressed as median (interquartile range); †chi-square test expressed as percentage (number of patients); ‡Fisher’s exact test expressed as percentage (number of patients).