Table 1.
Univariate comparison of patient characteristics by assay time period
| Patient Characteristics | Period A (n=1221) n (%) |
Period B (n=1160) n (%) |
p value |
|---|---|---|---|
|
| |||
| Positive on First Test | 240 (19.7) | 106 (9.1) | <0.01 |
|
| |||
| White | 807 (70.5) | 791 (72.2) | 0.38 |
|
| |||
| Female | 604 (49.5) | 605 (52.2) | 0.19 |
|
| |||
| Age ≥60 years old | 598 (49.0) | 554 (47.8) | 0.55 |
|
| |||
| Time to First Test (days, median (range)) |
3 (0, 183) | 3 (0, 48) | 0.90 |
|
| |||
| Albumin ≤ 2.5 g/dl | 152 (14.9) | 132 (13.7) | 0.44 |
|
| |||
| White blood cell count | |||
| <4 K cells/mm3 | 156 (13.4) | 206 (18.4) | <0.01 |
| 4-12 K cells/mm3 | 556 (47.9) | 522 (46.6) | Reference |
| >12 K cells/mm3 | 448 (38.6) | 391 (34.9) | 0.43 |
|
| |||
| Temperature ≥38 °C | 289 (24.0) | 277 (24.2) | 0.89 |