Table 1.
Characteristics of Study Participants
| Characteristic | Patients With ARTI Included in Current Study (n = 616) |
Total RESCEU Study Population (n = 1040) |
||
|---|---|---|---|---|
| Patients With RSV (n = 36) |
Patients With Influenza (n = 56a) |
Patients With Other ARTI (n = 583) |
||
| Age | ||||
| Median, y (range) | 75 (63–89) | 71 (60–90) | 75 (60–100) | 75 (60–100) |
| Age older than 75 y | 20 (56) | 25 (44) | 302 (52) | 562 (54) |
| Female sex | 20 (56) | 28 (49) | 320 (55) | 554 (54) |
| Comorbidityb | ||||
| Cardiovascular | 7 (19) | 10 (18) | 121 (21) | 212 (21) |
| Lung | 5 (14) | 7 (12) | 76 (13) | 120 (12) |
| Diabetes | 2 (6) | 5 (9) | 59 (10) | 80 (8) |
| Allergies, anyc | 11 (29) | 15 (27) | 167 (29) | 276 (27) |
| Hay fever | 3 (9) | 2 (4) | 32 (6) | 59 (6) |
| House dust mite | 0 (0) | 4 (7) | 22 (4) | 32 (3) |
| Pneumococcal vaccinationd | 4 (12) | 10 (21) | 71 (14) | 118 (13) |
| Influenza vaccinatione | 30 (86 | 44 (79) | 444 (79) | 752 (76) |
| Smoking status | ||||
| Current smoker | 3 (8) | 5 (9) | 35 (6) | 80 (8) |
| Former smoker | 14 (39) | 17 (30) | 241 (41) | 409 (39) |
Data are No. (%) except where indicated. Numbers represent individual participants. Missing data < 1% is not shown; if more than 1% is missing, the percentages are given as footnote.
Abbreviations: ARTI, acute respiratory tract infection; RESCEU, Respiratory Syncytial Virus Consortium in Europe; RSV, respiratory syncytial virus.
aOne patient experienced 2 separate influenza B infections during follow-up.
bCardiovascular comorbidity included all arrhythmias, structural heart diseases, angina, and cardiac events such as infarction, percutaneous coronary intervention, and bypass surgery. Hypertension was not included in this definition. Lung disease included asthma, chronic obstructive pulmonary disease, chronic bronchitis, and emphysema. Diabetes was defined as either type.
cMissing n = 12 (2%).
dMissing n = 56 (10%).
eMissing n = 19 (3%).