Table 2 Rates of IID in the community by age group, sex, socioeconomic and geographic factors, and number of previous IID episodes, IID2 Study, UK 2008-9
Stratum | Cases | PY | Rate | (95% CI) |
|---|---|---|---|---|
All | 1,320 | 4,658.6 | 283.4 | (268.5 - 299.1) |
Age group | ||||
<1 year | 33 | 26.9 | 1,228.3 | (873.2 - 1,727.7) |
1 to 4 years | 138 | 190.8 | 723.4 | (612.2 - 854.7) |
5 to 14 years | 129 | 424.1 | 304.2 | (256.0 - 361.5) |
15 to 64 years | 728 | 2,647.8 | 274.9 | (255.7 - 295.7) |
65+ years | 292 | 1,369.1 | 213.3 | (190.2 - 239.2) |
Sex | ||||
Male | 459 | 1,840.6 | 249.4 | (227.6 - 273.3) |
Female | 861 | 2,818.0 | 305.5 | (285.8 - 326.6) |
Number of previous episodes | ||||
0 | 1,086 | 4,300.0 | 254.7 | (240.0 - 270.3) |
1 | 186 | 349.6 | 532.1 | (460.9 - 614.3) |
2 | 40 | 40.8 | 980.2 | (719.0 - 1,336.3) |
3 | 7 | 4.1 | 1,710.2 | (815.3 - 3,587.3) |
4 | 1 | 0.1 | 7,305.0 | (1,029.0 - 51,858.7) |
Deprivation quintile | ||||
1 (most deprived) | 76 | 328.9 | 231.1 | (184.5 - 289.3) |
2 | 134 | 509.5 | 263.0 | (222.1 - 311.6) |
3 | 377 | 1,232.6 | 305.9 | (276.5 - 338.3) |
4 | 411 | 1,485.5 | 276.7 | (251.2 - 304.8) |
5 (least deprived) | 322 | 1,100.4 | 292.6 | (262.3 - 326.4) |
NS-SEC1 | ||||
Managerial and professional occupations | 749 | 2,418.3 | 309.7 | (288.3 - 332.7) |
Intermediate occupations | 58 | 202.8 | 286.0 | (221.1 - 370.0) |
Small employers and own account workers | 148 | 473.6 | 312.5 | (266.0 - 367.1) |
Lower supervisory and technical occupations | 83 | 459.2 | 180.8 | (145.8 - 224.2) |
Semi-routine and routine occupations | 78 | 320.6 | 243.3 | (194.9 - 303.7) |
Not classifiable | 204 | 784.2 | 260.1 | (226.8 - 298.4) |
Urban–rural classification | ||||
Urban | 765 | 2,778.1 | 275.4 | (256.5 - 295.6) |
Town | 158 | 580.2 | 272.3 | (233.0 - 318.3) |
Rural | 397 | 1,298.6 | 305.7 | (277.1 - 337.3) |