Characteristic | Unvaccinateda (n = 18,223) | Vaccinated (n = 8,981) | pvalueb | Total N = 27,204 |
---|---|---|---|---|
No. (%) | ||||
Age group, yrsc | ||||
60-69 | 8522 (46.8) | 3879 (43.2) | < 0.001 | 12401 (45.6) |
70-79 | 5833 (32.0) | 3451 (38.4) | 9284 (34.1) | |
≥ 80 | 3868 (21.2) | 1651 (18.4) | 5519 (20.3) | |
Sex, Male | 8074 (44.3) | 4063 (45.2) | 0.145 | 12137 (44.6) |
No. of outpatient visits during previous 12 monthsd | ||||
[0-2] | 4886 (26.8) | 1168 (13) | < 0.001 | 6054(22.3) |
[3-5] | 4183 (23.0) | 2207 (24.6) | 6390(23.5) | |
[6-9] | 4338 (23.8) | 2569 (28.6) | 6907(25.4) | |
≥10 | 4816 (26.4) | 3037 (33.8) | 7853(28.9) | |
Influenza vaccination in previous Autumn | 6997 (38.4) | 7371 (82.1) | < 0.001 | 14368 (52.8) |
History of coronary artery disease | 1122 (6.2) | 611 (6.8) | 0.040 | 1733 (6.4) |
History of stroke | 808 (4.4) | 486 (5.4) | < 0.001 | 1294 (4.8) |
Chronic pulmonary disease | 1421 (7.8) | 742 (8.3) | 0.183 | 2163 (8.0) |
Chronic heart diseasee | 2084 (11.4) | 1324 (14.7) | < 0.001 | 3408 (12.5) |
Chronic liver disease | 383 (2.1) | 239 (2.7) | 0.004 | 622 (2.3) |
Chronic nephropathy | 44 (2.4) | 214 (2.4) | 0.786 | 658 (2.4) |
Diabetes mellitus | 3713 (20.4) | 2192 (24.4) | < 0.001 | 5905 (21.7) |
Hypertension | 9245 (50.7) | 5304 (59.1) | < 0.001 | 14549 (53.5) |
Hypercholesterolemia | 6351 (34.9) | 3611 (40.2) | < 0.001 | 9962 (36.6) |
Obesity (BMI > 30) | 5089 (27.9) | 3150 (35.1) | < 0.001 | 8239 (30.3) |
Smoking status | ||||
Non-smoker | 12855 (70.5) | 5826 (64.9) | < 0.001 | 18681(68.7) |
Quit | 3479 (19.1) | 2248 (25.0) | 5727(21.1) | |
Current | 1889 (10,4) | 907 (10.1) | 2796(10.3) | |
Alcoholism | 655 (3.6) | 340 (3.8) | 0.429 | 995 (3.7) |
Cancer | 1297 (7.1) | 703 (7.8) | 0.035 | 2000 (7.4) |
Immunosuppressive medication | 772 (4.2) | 425 (4.7) | 0.061 | 1197 (4.4) |
Immunocompromisef | 1921 (10.5) | 1005 (11.2) | 0.104 | 2926 (10.8) |
Dementia | 535 (2.9) | 266 (3.0) | 0.905 | 801 (2.9) |
Nursing-home residence | 265 (1.5) | 110 (1.2) | 0.127 | 375 (1.4) |