TABLE 1.
Description of the study sample by availability of laboratory data (n = 3777)
| Variable | Labs (n = 2563, 67.9%) N (%) | No Labs (n = 1214, 32.1%) N (%) | P‐value |
|---|---|---|---|
| Sex | |||
| Male | 1459 (56.9) | 610 (50.3) | .0001 |
| Female | 1104 (43.1) | 604 (49.8) | |
| Race ‡ | |||
| Non‐Hispanic white | 632 (24.7) | 381 (33.4) | <.0001 |
| Non‐white, Hispanic | 1931 (75.3) | 760 (66.6) | |
| Age (years) ‡ | |||
| < 52 | 628 (24.5) | 735 (64.4) | <.0001 |
| 52 ‐ 64 | 605 (23.6) | 253 (22.2) | |
| 64 ‐ 75 | 707 (27.6) | 124 (10.9) | |
| > 75 | 622 (24.3) | 29 (2.5) | |
| Comorbidities | |||
| Myocardial Infarction | 134 (5.2) | 17 (1.4) | <.0001 |
| Congestive Heart Failure | 275 (10.7) | 21 (1.7) | <.0001 |
| Peripheral Vascular Disease | 135 (5.3) | 5 (0.4) | <.0001 |
| Stroke or TIA* | 205 (8.0) | 8 (0.7) | <.0001 |
| Dementia | 196 (7.7) | 7 (0.6) | <.0001 |
| COPD † | 160 (6.2) | 8 (0.7) | <.0001 |
| Connective Tissue Disease | 59 (2.3) | 13 (1.1) | .0098 |
| Peptic Ulcer Disease | 23 (0.9) | 9 (0.7) | .6251 |
| Liver Disease | 57 (2.2) | 5 (0.4) | <.0001 |
| Diabetes | 516 (20.1) | 103 (8.5) | <.0001 |
| Diabetes with end organ damage | 417 (16.3) | 22 (1.8) | <.0001 |
| Chronic Kidney Disease Stage III | 331 (12.9) | 22 (1.8) | <.0001 |
| Solid Cancers | 216 (8.4) | 23 (2.7) | <.0001 |
| Leukemia/Lymphoma | 66 (2.6) | 9 (0.7) | .0002 |
| AIDS | 11 (0.4) | 4 (0.3) | .6491 |
| Hemiplagia | 24 (0.9) | 2 (0.2) | .0074 |
| Charlson Comorbidity Score | |||
| Mean (SD) | 1.7 (2.1) | 0.4 (1.0) | <.0001 |
| BMI (kg/m2) # | |||
| ≤ 30 | 1523 (59.4) | 665 (54.8) | <.0001 |
| > 30 | 879 (34.3) | 221 (18.2) | |
| Mechanical Ventilation | |||
| No | 2045 (80.0) | 1201 (98.9) | <.0001 |
| Yes | 518 (20.2) | 13 (1.1) | |
| Anemia § (< 12 g/dL Hemoglobin, females; < 13 g/dL, males) | |||
| Yes | 793 (30.9) | ||
| No | 1770 (69.1) | ||
| Absolute Lymphocyte Count$ (# x 109 / L) | |||
| < 1 | 848 (44.4) | ||
| ≥1 | 1066 (55.7) | ||
| Platelet count ¶ (# x 109 / L) | |||
| < 150 | 438 (22.5) | ||
| ≥150 | 1510 (77.5) | ||
*
Transient Ischemic Attack.
†
Chronic Obstructive Pulmonary Disease.
‡
Race was missing for 73 patients and age was missing for 74 patients.
$ BMI information missing for 489 patients.
§
Laboratory measurements reported on 2,563 patients, 1 patient dropped in subsequent analyses due to missing age.
¶
2,558 patients with valid platelet measures.
#
2,507 patients with valid lymphocyte measures.