Table 3

Relative risk ratios (RRR) for persistent asthma by relative inequality index adjusted for blocks of mediators (N=7487)

Baseline modelModel 1Model 2Model 3Model 4
RRR*95% CIRRR95% CIRRR95% CIRRR95% CIRRR95% CI
Transient asthma
 RII1.250.83 to 1.901.030.67 to 1.581.000.64 to 1.550.960.62 to 1.480.890.58 to 1.36
Persistent asthma
 RII1.701.21 to 2.401.451.03 to 2.061.451.02 to 2.051.491.04 to 2.141.410.98 to 2.03
  • Model 1: Baseline model+perinatal characteristics (maternal pre-pregnancy body mass index; breastfeeding duration; birth weight; gestation; maternal smoking during pregnancy; alcohol use during pregnancy; wheeze.

  • Model 2: Model 1+housing conditions (damp; tenure; furry pets; environmental tobacco smoke; access to garden).

  • Model 3: Model 2+potential exposure to infection (sibling number; childcare type).

  • Model 4: Model 3+neighbourhood characteristics (volume of traffic; housing quality; rubbish; area rating).

  • *All models were adjusted for baseline confounders (child sex, maternal age at birth, maternal ethnicity and maternal atopy).

  • RII, relative index of inequality .