Table 1 |
||||
|
Characteristics of the controls and patients with laboratory-confirmed, hospital-acquired influenza (HAI) and of the factors associated with HAI in Edouard Herriot Hospital, Lyon (France), in influenza seasons 2004-05, 2005-06 and 2006-07 |
||||
|
Characteristics |
Patients with confirmed HAI (N = 11) |
Controls (N = 44) |
P |
Crude ORa (95% CI) |
|
|
||||
|
Gender, female |
8 (73) |
33 (75) |
1.0 |
0.89 (0.22-3.72) |
|
|
||||
|
Age, years |
0.99 (0.97-1.02)b |
|||
|
|
||||
|
Median (range) |
66.0 (48.5-85.1) |
78.7 (42.3-86.7) |
0.6 |
|
|
|
||||
|
Type of ward |
1.0 |
|||
|
|
||||
|
Medicine |
8 (73) |
31 (70) |
1.0 (Ref.) |
|
|
|
||||
|
Surgery |
3 (27) |
13 (30) |
0.90 (0.21-3.89) |
|
|
|
||||
|
Chronic pulmonary disease |
2 (18) |
5 (11) |
0.6 |
1.60 (0.31-8.25) |
|
|
||||
|
Chronic cardiac disease |
5 (45) |
21 (48) |
1.0 |
0.92 (0.26-3.28) |
|
|
||||
|
Immuno-depression |
2 (18) |
1 (2) |
0.10 |
8.00 (0.73-88.22) |
|
|
||||
|
Potential influenza source in the unitc |
7 (64) |
13 (30) |
0.08 |
4.06 (1.08-15.33) |
|
|
||||
|
Individual influenza vaccinationd, e |
2 (20) |
21 (48) |
0.16 |
0.34 (0.069-1.70) |
|
|
||||
|
Proportion of vaccinated HCW in the unit |
0.10 |
|||
|
|
||||
|
< 35% |
8 (73) |
19 (43) |
1.0 (Ref.) |
|
|
|
||||
|
≥ 35% |
3 (27) |
25 (57) |
0.16 (0.018-1.32) |
|
|
|
||||
|
Data are reported as numbers (%) under descriptive analysis and as OR (95% CI) under logistic regression analysis. Controls were hospitalised patients with ILI and confirmed exclusion of influenza diagnosis after nasal swabbing; they were matched by influenza season (2004-05, 2005-06 and 2006-07). HAI, hospital-acquired influenza; OR, odds ratio; CI, confidence interval; HCW, healthcare workers. aUnder univariate conditional logistic regression bPer 1 year older cPotential sources of exposure to influenza (other patients or HCW) for 5 days before ILI or influenza occurrence in the same ward dIn current influenza season eIndividual influenza vaccination was not known in 1 patient |
||||
|
Bénet et al. BMC Infectious Diseases 2012 12:30 doi:10.1186/1471-2334-12-30 |
||||
