Table 2.
Results of the Logistic Regression modelling according to selected risk factors
| |
Cases |
Controls |
Odds ratio* |
95% confidence interval |
|||
|---|---|---|---|---|---|---|---|
| n | % | n | % | ||||
|
Ever breastfed? | |||||||
| No |
12 |
24.5 |
13 |
16.7 |
REF |
|
|
| Yes |
32 |
65.3 |
62 |
79.5 |
0.4 |
0.2 |
1.2 |
| Missing |
5 |
10.2 |
3 |
3.9 |
|
|
|
|
Caesarean section? | |||||||
| No |
33 |
67.4 |
63 |
80.8 |
REF |
|
|
| Yes |
11 |
22.5 |
11 |
14.1 |
1.6 |
0.6 |
4.4 |
| Missing |
5 |
10.2 |
4 |
5.1 |
|
|
|
|
Birthweight (g) | |||||||
| <2500 |
2 |
4.1 |
3 |
3.9 |
1.5 |
0.2 |
11.9 |
| 2500-2999 |
4 |
8.2 |
12 |
15.4 |
1.0 |
0.2 |
4.0 |
| 3000-3499 |
11 |
22.5 |
30 |
38.5 |
REF |
|
|
| 3500-3999 |
16 |
32.7 |
16 |
20.5 |
2.9 |
1.0 |
8.2 |
| 4000+ |
11 |
22.5 |
9 |
11.5 |
3.7 |
1.1 |
12.4 |
| Missing |
5 |
10.2 |
8 |
10.3 |
|
|
|
|
Number of siblings | |||||||
| 0 |
5 |
10.2 |
8 |
10.3 |
REF |
|
|
| 1 |
20 |
40.8 |
37 |
47.4 |
1.1 |
0.3 |
4.3 |
| 2 |
9 |
18.4 |
21 |
26.9 |
1.0 |
0.2 |
4.3 |
| 3+ |
15 |
30.6 |
9 |
11.5 |
3.0 |
0.7 |
13.6 |
| Missing |
0 |
0.0 |
3 |
3.9 |
|
|
|
|
Spoken on a mobile phone more than 20 times? | |||||||
| No |
23 |
46.9 |
28 |
35.9 |
REF |
|
|
| Yes |
26 |
53.1 |
49 |
62.8 |
0.9 |
0.2 |
3.3 |
| Missing |
0 |
0.0 |
1 |
1.3 |
|
|
|
|
Any animals kept at home? | |||||||
| No |
11 |
22.5 |
14 |
17.9 |
REF |
|
|
| Yes |
38 |
77.5 |
62 |
79.5 |
1.0 |
0.3 |
2.9 |
| Missing |
0 |
0.0 |
2 |
2.6 |
|
|
|
|
Regular contact with animals outside the home? | |||||||
| No |
35 |
71.4 |
47 |
60.3 |
REF |
|
|
| Yes |
14 |
28.6 |
31 |
39.7 |
0.7 |
0.3 |
1.5 |
| Missing | 0 | 0.0 | 0 | 0.0 | |||
*Odds ratios calculated using conditional logistic regression stratified by age (5-year groups) and sex, analyses were adjusted for deprivation by the use of Townsend score quintiles based on the UK population distribution.
REF, Reference category.