Table 3.
Factors associated with IID incidence in the community, IID2 Study, UK 2008–9
| Variable | RR | p | (95% CI)1 |
|---|---|---|---|
| Age group |
|
|
|
| <1 year-olds |
5.00 |
<0.001 |
(3.11 - 8.03) |
| 1 to 4 year-olds |
3.62 |
<0.001 |
(2.91 - 4.52) |
| 5 to 14 year-olds |
1.40 |
0.003 |
(1.12 - 1.76) |
| 15 to 64 year-olds |
1.27 |
0.002 |
(1.09 - 1.48) |
| 65+ year-olds |
1.00 |
-- |
-- |
| Linear effect of previous episodes on: |
|
|
|
| <1 year-olds |
1.70 |
0.001 |
(1.25 - 2.32) |
| 1 to 4 year-olds |
1.28 |
0.109 |
(0.95 - 1.72) |
| 5 to 14 year-olds |
2.49 |
<0.001 |
(1.78 - 3.47) |
| 15 to 64 year-olds |
2.08 |
<0.001 |
(1.80 - 2.41) |
| 65+ year-olds |
3.08 |
<0.001 |
(2.54 - 3.74) |
| Sex |
|
|
|
| Male |
1.00 |
-- |
-- |
| Female |
1.22 |
0.001 |
(1.08 - 1.37) |
| NS-SEC |
|
|
|
| Managerial and professional occupations |
1.00 |
-- |
-- |
| Intermediate occupations |
0.96 |
0.772 |
(0.74 - 1.25) |
| Small employers and own account workers |
0.98 |
0.843 |
(0.82 - 1.17) |
| Lower supervisory and technical occupations |
0.63 |
<0.001 |
(0.51 - 0.80) |
| Semi-routine and routine occupations |
0.82 |
0.089 |
(0.64 - 1.03) |
| Not classifiable | 0.90 | 0.189 | (0.76 - 1.05) |
195% CIs are based on robust standard errors.
Results from a multivariable Cox regression model.