Table 1.
Demographic and clinical characteristics of the total population, n = 114.
| Total n = 114 |
Survivors n = 100 (87.7%) |
Non-Survivors n = 14 (12.3%) |
Missing Data | p-Value | |
|---|---|---|---|---|---|
| Patient characteristics | |||||
| Age, years, mean, ± SD | 87.9 ± 5.5 | 87.3 ± 5.4 | 91.5 ± 4.7 | - | 0.006 |
| Gender, female, n (%) | 82 (71.9) | 72 (72) | 10 (71.4) | - | 1.000 |
| Charlson Comorbidity Index score, ± SD | 2.83 ± 1.7 | 2.73 ± 1.7 | 3.57 ± 1.7 | - | 0.119 |
| Diabetes, n (%) | 25 (21.9) | 23 (23) | 2 (14.3) | - | 0.731 |
| Chronic renal disease, n (%) | 15 (13.2) | 14 (14) | 1 (7.1) | - | 0.690 |
| Chronic respiratory disease, n (%) | 16 (14) | 13 (13) | 3 (21.4) | - | 0.413 |
| Chronic cardiac disease, n (%) | 37 (32.5) | 29 (29) | 8 (57.1) | - | 0.063 |
| Immunosuppression, n (%) | 17 (14.9) | 15 (15) | 2 (14.3) | - | 1.000 |
| ADL, mean ± SD | 3.08 ± 2.1 | 3.25 ± 2.1 | 1.82 ± 1.7 | - | 0.020 |
| Number of drugs, n ± SD | 6.32 ± 3.0 | 6.15 ± 3.2 | 7.50 ± 1.8 | - | 0.026 |
| Statin therapy, n (%) | 23 (20.2) | 20 (20) | 3 (21.4) | - | 1.000 |
| Vaccination, n (%) | 44 (38.6) | 37 (37) | 7 (50) | 70 (61.4) | 0.576 |
| Influenza infection characteristics | |||||
| Influenza A, n (%) | 107 (93.9) | 93 (93) | 14 (100) | - | 0.594 |
| Delay between diagnosis and the onset of symptoms, days, n ± SD | 2.91 ± 3.5 | 2.94 ± 3.6 | 2.71 ± 2.1 | - | 0.408 |
| Nosocomial infection, n (%) | 35 (30.7) | 32 (32) | 3 (21.4) | - | 0.545 |
| Antiviral < 48 h, n (%) | 48 (42.1) | 45 (45) | 3 (21.4) | - | 0.147 |
| Pneumonia, n (%) | 56 (49.1) | 46 (46) | 10 (71.4) | - | 0.092 |
| Antibiotic prescription, n (%) | 61 (53.5) | 50 (50) | 11 (78.6) | - | 0.051 |
| SOFA score, mean ± SD | 1.3 (1,4) | 1.12 (1.3) | 2.57 (1.6) | - | 0.001 |
| Lymphopenia, n (%) | 77 (73.3) | 66 (66) | 11 (78.6) | 9 (7.9) | 0.506 |
SD, Standard Deviation; ADL, Activities of Daily Living.