Table 1.
Baseline characteristics of the study population stratified by self-report receipt of a 2019–2020 seasonal influenza vaccine.
| Characteristic | Not Vaccinated N=264 | Vaccinated N=415 | P-value |
|---|---|---|---|
| Age, median (IQR) [years] | 50 (35, 62) | 62 (51, 72) | <0.001 |
| Age categories, n (column %) | |||
| 18 – 49 years | 129 (48.9) | 97 (23.4) | |
| 50 – 64 years | 86 (32.6) | 131 (31.6) | |
| ≥ 65 years | 49 (18.6) | 187 (45.1) | |
| Sex – Female, n (%) | 132 (50.0) | 217 (52.3) | 0.561 |
| Race/ethnicity, n (column %) | 0.014 | ||
| White Non-Hispanic | 141 (53.4) | 269 (64.8) | |
| Black Non-Hispanic | 75 (28.4) | 96 (23.1) | |
| Hispanic | 35 (13.3) | 41 (9.9) | |
| Other Race Non-Hispanic | 13 (4.9) | 9 (2.2) | |
| Race/Ethnicity binary, n (column %) | 0.003 | ||
| White non-Hispanic | 141 (53.4) | 269 (64.8) | |
| Non-White or Hispanic | 123 (46.6) | 146 (35.2) | |
| Insurance Status, n (column %) | <0.001 | ||
| Medicare | 60 (22.7) | 214 (51.6) | |
| Medicaid | 70 (26.5) | 58 (14.0) | |
| Private | 86 (32.6) | 120 (28.9) | |
| No medical insurance | 35 (13.3) | 6 (1.5) | |
| Other | 13 (4.9) | 17 (4.1) | |
| Source of vaccine history information during interview, n (%) | 0.559 | ||
| Patient | 213 (80.7) | 345 (83.1) | |
| Surrogate | 42 (15.9) | 54 (13.0) | |
| Mix of patient and surrogate | 9 (3.4) | 16 (3.9) | |
| Chronic medical conditions, n (column %) | |||
| Cardiovascular disease | 130 (49.2) | 295 (71.1) | <0.001 |
| Neurologic disease | 25 (9.5) | 69 (16.6) | 0.009 |
| Pulmonary disease | 94 (35.6) | 194 (46.8) | 0.004 |
| Gastrointestinal disease | 18 (6.8) | 39 (9.4) | 0.237 |
| Endocrine disease | 78 (29.6) | 196 (47.2) | <0.001 |
| Renal disease | 23 (8.7) | 104 (25.1) | <0.001 |
| Hematologic disease | 49 (18.6) | 80 (19.3) | 0.817 |
| Active malignancy | 25 (9.5) | 76 (18.3) | 0.002 |
| Immunosuppressive condition | 84 (31.8) | 193 (46.5) | <0.001 |
| Psychiatric disease | 58 (22.0) | 119 (28.7) | 0.052 |
| Current pregnancy, n (column %) | 6 (2.3) | 3 (0.7) | 0.085 |
| Currently smoking, n (column %) | 85 (32.2) | 75 (18.1) | <0.001 |
| Type of Admission, n (column %) | 0.619 | ||
| Non-ICU admission | 145 (54.9) | 236 (56.9) | |
| ICU admission | 119 (45.1) | 179 (43.1) | |
| Pre-illness home, n (column %) | 0.037 | ||
| Home in community | 233 (88.3) | 361 (87.0) | |
| Nursing home | 4 (1.5) | 16 (3.9) | |
| Assisted living home | 4 (1.5) | 15 (3.6) | |
| Subacute or other chronic care facility | 2 (0.8) | 7 (1.7) | |
| School housing | 0 | 1 (0.2) | |
| Homeless | 16 (3.1) | 10 (2.4) | |
| Other | 5 (1.9) | 5 (1.2) |