Table 1.
Characteristics of cohort participants with 0, 1 and multiple episodes of IID during their follow-up time, UK 2008-9
| |
Number of episodes |
|
|
|||||
|---|---|---|---|---|---|---|---|---|
| |
None |
Single |
Multiple |
|
|
|||
| Variable | No. | % | No | % | No | % | χ2 | p |
| Age group |
|
|
|
|
|
|
|
|
| <1 year |
24 |
57.1% |
9 |
21.4% |
9 |
21.4% |
180.20 |
<0.001 |
| 1 to 4 years |
182 |
62.5% |
86 |
29.6% |
23 |
7.9% |
|
|
| 5 to 14 years |
517 |
82.9% |
90 |
14.4% |
17 |
2.7% |
|
|
| 15 to 64 years |
3,357 |
84.5% |
518 |
13.0% |
99 |
2.5% |
|
|
| 65+ years |
1,666 |
87.5% |
198 |
10.4% |
41 |
2.2% |
|
|
| Sex |
|
|
|
|
|
|
|
|
| Male |
2,307 |
86.2% |
300 |
11.2% |
69 |
2.6% |
15.92 |
<0.001 |
| Female |
3,439 |
82.7% |
601 |
14.4% |
120 |
2.9% |
|
|
| NS-SEC1 |
|
|
|
|
|
|
|
|
| Managerial and professional occupations |
2,938 |
82.6% |
514 |
14.5% |
105 |
3.0% |
30.32 |
0.001 |
| Intermediate occupations |
256 |
83.1% |
47 |
15.3% |
5 |
1.6% |
|
|
| Small employers and own account workers |
574 |
82.7% |
96 |
13.8% |
24 |
3.5% |
|
|
| Lower supervisory and technical occupations |
620 |
89.5% |
63 |
9.1% |
10 |
1.4% |
|
|
| Semi-routine and routine occupations |
408 |
86.4% |
53 |
11.2% |
11 |
2.3% |
|
|
| Not classifiable |
950 |
85.4% |
128 |
11.5% |
34 |
3.1% |
|
|
| Quintile of deprivation2 |
|
|
|
|
|
|
|
|
| 1 (most deprived) |
420 |
87.1% |
49 |
10.2% |
13 |
2.7% |
12.48 |
0.131 |
| 2 |
644 |
86.2% |
80 |
10.7% |
23 |
3.1% |
|
|
| 3 |
1,515 |
83.3% |
247 |
13.6% |
56 |
3.1% |
|
|
| 4 |
1,798 |
83.9% |
286 |
13.4% |
58 |
2.7% |
|
|
| 5 (least deprived) |
1,366 |
83.1% |
239 |
14.5% |
39 |
2.4% |
|
|
| Urban/rural indicator2 |
|
|
|
|
|
|
|
|
| Urban |
3,445 |
84.5% |
514 |
12.6% |
116 |
2.8% |
15.06 |
0.005 |
| Town |
766 |
86.3% |
96 |
10.8% |
26 |
2.9% |
|
|
| Rural | 1,532 | 81.9% | 291 | 15.6% | 47 | 2.5% | ||
1 National-Statistics Socioeconomic Classification; 2 3 missing values.