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.

Tam et al.

Tam et al. BMC Public Health 2013 13:739   doi:10.1186/1471-2458-13-739

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