Epidemiology of Respiratory Pathogens among Elderly Nursing Home Residents with Acute Respiratory Infections in Corsica, France, 2013–2017
Table 3
Comparison of the characteristics between residents with acute respiratory infections (ARIs) testing positive and negative for influenza A(H3N2) and positive to respiratory viruses other than influenza and negative for any other identified etiology.
Characteristics
Influenza A(H3N2) cases (%)
Noninfluenza A(H3N2) cases (%)
value
Respiratory viruses other than influenza (A and B) (%)
value
Negative (any identified etiology) cases (%)
value
Age (years), median (IQR)
87.5 (69–96)
88.4 (63–103)
0.81
83 (63–95)
0.6
90 (66–103)
0.3
Age groups (years)
60–69
1 (2.6)
3 (4.3)
1
2 (10)
0.2
1 (2.2)
0.7
70–79
6 (15.7)
4 (5.7)
0.16
2 (10)
0.7
2 (4.3)
0.08
80–89
16 (42.1)
31 (44.9)
0.8
11 (55)
0.4
19 (41.3)
0.56
≥90
15 (39.4)
31 (44.9)
0.8
5 (25)
0.3
24 (52.2)
0.17
Gender
Female
28 (73.7)
52 (75.3)
0.4
16 (80)
0.8
33 (71.7)
0.41
Seasonal influenza vaccination
36 (94.7)
61 (88.4)
0.1
18 (90)
0.6
40 (86.9)
0.1
Risk factors
19 (50.0)
36 (52.1)
0.4
13 (65)
0.4
23 (50.0)
0.6
Symptoms
Fever
35 (92.1)
47 (68.1)
0.004
12 (60)
0.002
33 (71.7)
0.02
Cough
32 (84.2)
64 (92.7)
0.3
19 (95)
0.4
42 (91.3)
0.2
Headaches
11 (28.9)
15 (21.7)
0.4
4 (20)
0.5
11 (23.9)
0.4
Dyspnea
4 (10.5)
11 (15.9)
0.5
3 (15)
0.6
6 (13.0)
0.5
Rhinorrhea
15 (39.5)
23 (33.3)
0.5
9 (45)
0.7
14 (30.4)
0.3
Asthenia
18 (47.4)
40 (57.9)
0.3
12 (60)
0.4
25 (54.3)
0.3
Otitis
0 (0.0)
0 (0.0)
1
0 (0.0)
1
0 (0.0)
1
Conjunctival hyperemia
3 (7.9)
1 (1.4)
0.12
0 (0.0)
0.5
1 (2.2)
0.2
Abdominal pain
1 (2.6)
1 (1.4)
1
0 (0.0)
1
1 (2.2)
0.7
Diarrhea
0 (0.0)
3 (4.3)
0.5
1 (5)
1
2 (4.3)
0.3
Vomiting
0 (0.0)
0 (0.0)
1
0 (0.0)
1
0 (0.0)
1
Hospitalization
4 (10.5)
2 (2.8)
0.18
2 (10)
1
0 (0.0)
0.04
Oseltamivir
3 (7.9)
1 (1.4)
0.12
1 (5)
1
0 (0.0)
0.09
Antibiotics
13 (34.2)
26 (37.7)
0.8
12 (60)
0.09
12 (26)
0.3
All-cause mortality
3 (7.9)
0 (0.0)
0.04
0 (0.0)
0.5
0 (0.0)
0.09
Note. Comparison of influenza A(H3N2) cases versus other respiratory viruses (influenza B viruses were not included) and versus cases testing negative for any identified etiology. IQR: interquartile range.
