Characteristics
Cohort participants
Cohort participants
p-value
Without cardiopulmonary conditions (n=2,907) n (%) With cardiopulmonary conditions (n=313) n (%)
Total person-years 5532 558
Age (years), median (IQR) 72 (69, 76) 73 (70, 78) 0.003
Age group
<75 years
1,925 (66.2)
190 (60.7)
0.052
≥75 years
982 (33.8)
123 (39.3)
Male 1,157 (39.8) 167 (53.4) <0.001
Influenza vaccination uptake
2015 – 2016
1,497 (51.5)
169 (54.0)
0.405
2016 – 2017
1,347 (47.5)
151 (53.0)
0.082
Co-morbidity
Yes
1,163 (40.0)
156 (49.8)
<0.001
Hypertension
670 (23.1)
85 (27.2)
0.107
Diabetes
543 (18.7)
62 (19.8)
0.648
Neuromuscular diseases
83 (2.9)
14 (4.5)
0.117
Chronic kidney diseases
79 (2.7)
11 (3.5)
0.370
Cerebrovascular diseases
74 (2.6)
11 (3.5)
0.350
Chronic liver diseases
13 (0.5)
3 (1.0)
0.199
Thalassemia
4 (0.1)
6 (1.9)
<0.001
Cancer
81 (2.8)
17 (5.4)
0.015
Chemotherapy
10 (0.3)
2 (0.6)
0.328
Mean number of hospital visits (SD) 2.8 (1.6) 3.5 (1.1) <0.001