Table 3.
Potential determinants for IVC for seasonal and pandemic influenza, 2009-2010 season
| Seasonal influenza vaccination | Pandemic influenza vaccination | |||||
| Odd ratio (95% CI) | Odd ratio (95% CI) | |||||
| Unadjusted univariate | Adjusted multi-variate | p-value | Unadjusted univariate | Adjusted multi-variate | p-value | |
|
Age group (Ref. Older than 64 years) |
||||||
| 0 - 4 years | 0.03 (0.02-0.05) |
0.3 (0.1-0.6) |
< 0.001 | 1.8 (1.2-2.7) |
2.1 (1.0-4.5) |
0.04 |
| 5 - 14 years | 0.04 (0.03-0.07) |
0.3 (0.2-0.6) |
0.001 | 1.2 (0.8-2.0) |
2.2 (1.0-4.8) |
ns (0.05) |
| 15 - 29 years | 0.05 (0.03-0.09) |
0.4 (0.2-0.8) |
0.005 | 0.6 (0.3-1.1) |
1.3 (0.5-3.0) |
Ns |
| 30 - 64 years | 0.13 (0.1-0.2) |
0.8 (0.5-1.2) |
0.25 | 1.1 (0.8-1.6) |
2.0 (1.0-3.8) |
0.04 |
| Number of children (< 5 years) in the household (ref. None) | ||||||
| One child | 0.2 (0.2-0.4) |
0.8 (0.5 - 1.3) |
ns | 2.0 (1.4-2.9) |
2.0 (1.3-3.1) |
0.003 |
| Two children or more | 0.3 (0.1-0.6) |
0.8 (0.3 - 1.7) |
ns | 2.5 (1.4-4.4) |
2.7 (1.4-5.1) |
0.004 |
|
Number of persons in the household (ref: 1 person) |
||||||
| 2 persons | 0.8 (0.7-1.0) |
0.9 (0.7 - 1.2) |
ns | 1.5 (1.0-2,1) |
1.5 (1.0-2.2) |
Ns |
| 3 persons | 0.23 (0.2-0.3) |
0.8 (0.5 - 1.1) |
ns | 2.0 (1.3-3.1) |
3.5 (1.5-4.1) |
< 0.001 |
| 4 persons or more | 0.2 (0.2-0.3) |
0.8 (0.5 - 1.2) |
ns | 2.2 (1.5-3.2) |
3.5 (1.4-4.3) |
0.001 |
|
Gender (Ref. female) |
0.8 (0.7-1.0) |
1.1 (0.9 - 1.4) |
ns | 1.2 (0.9-1.5) |
1.1 (0.8-1.4) |
Ns |
|
Education level of the head of the family (ref. primary level of education) |
||||||
| Less than high school | 0.3 (0.2-0.4) |
0.7 (0.5 - 1.0) |
ns | 1.0 (0.7-1.5) |
1.3 (0.8-2.0) |
Ns |
| High school graduate | 0.3 (0.2 - 0.4) |
0.7 (0.5 - 1.1) |
ns | 0.8 (0.4-1.3) |
0.8 (0.4-1.4) |
Ns |
| University graduate (2 years) | 0.1 (0.1-0.2) |
0.4 (0.2 - 0.7) |
< 0.001 | 1.3 (0.8-2.2) |
1.5 (0.9-2.7) |
Ns |
| University graduate (>2 years) | 0.3 (0.2-0.4) |
0.9 (0.6 - 1.3) |
ns | 3.0 (2.0-4.4) |
2.5 (1.5-4.1) |
< 0.001 |
|
At-risk individual (Ref. not to be an at-risk individual |
||||||
| All age groups included | 9.9 (7.7-12.2) |
4.0 (2.6-6.0) |
< 0.001 | 1.5 (1.0-2.3) |
1.2 (0.7-2.0) |
Ns |
| At-risk individual younger than 65 years old | 4.5 (3.1-6.6) |
4.0 (2.6-6.1) |
< 0.001 | 1.6 (1.0-2.5) |
1.2 (0.7-2.0) |
Ns |
| Healthcare worker* | 4.2 (2.6-6.5) |
4.9 (2.9-8.1) |
< 0.001 | 4.4 (2.7-7.1) |
3.0 (1.8-5.0) |
0.001 |
|
Occupation of the head of the family (Ref. manual worker) |
||||||
| Farmer | 0.6 (0.2-1.6) |
0.7 (0.3-1.7) |
ns | 2.0 (0.8-5.4) |
3.0 (1.1-8.0) |
0.03 |
| Self employed | 1.4 (0.8-2.5) |
1.5 (0.8-2.6) |
ns | 2.3 (1.2-4.5) |
1.9 (0.9-3.8) |
Ns |
| Higher professional and managerial occupation | 0.9 (0.5-1.4) |
0.9 (0.5-1.5) |
ns | 3.9 (2.4-6.2) |
3.0 (1.5 - 5.5) |
0.001 |
| Intermediate occupation | 1.0 (0.6-1.6) |
1.1 (0.6-1.9) |
ns | 2.2 (1.3-3.8) |
2.0 (1.0-3.8) |
0.04 |
| Clerical | 0.7 (0.5-1.2) |
0.8 (0.5-1.3) |
ns | 1.3 (0.8-2.1) |
1.5 (0.8-2.6) |
Ns |
| Retired | 6.9 (4.8-9.9) |
1.7 (1.1-2.6) |
0.02 | 2.2 (1.3-3.8) |
2.0 (1.0-4.0) |
0.04 |
| Student | 0.4 (0.1-1.9) |
0.4 (0.1-2.2) |
ns | 1.0 (0.2-4.7) |
2.3 (0.4-13.0) |
Ns |
| Unemployed | 3.1 (1.7-5.7) |
1.9 (0.9-3.7) |
ns | 0.8 (0.3-2.0) |
0.7 (0.2-1.9) |
Ns |
|
Town size (Ref. rural) |
||||||
| < 20,000 inhabitants | 1.4 (1.0-1.8) |
1.4 (1.0-1.9) |
0.03 | 1.0 (0.7-1.5) |
- | |
| [20,000; 100 000[ inhabitants | 1.4 (1.0-1.9) |
1.5 (1.1-2.2) |
0.02 | 1.2 (0.7-1.8) |
- | |
| ≥ 100 000 inhabitants | 1.3 (1.0-1.6) |
1.6 (1.2-2.2) |
< 0.001 | 1.3 (0.9-1.9) |
- | |
| Paris | 0.9 (0.7-1.3) |
1.2 (0.8-1.7) |
ns | 1.4 (0.9-2.2) |
- | |
| Free seasonal influenza vaccination offered (for non at-risk individuals) | 3.9 (2.9-5.3) |
4.5 (3.2-6.3) |
< 0.001 | - | - | |
| Vaccinated against seasonal influenza | - | - | - | 3.5 (2.7-4.6) |
7.1 (5.1-10.0) |
< 0.001 |
* for people aged 20-64 years
ns: non significant