3.6 Results of sensitivity analysis
In the WQS model of the combined effect of pollutants during pregnancy
and at 1 year of age on the risk of eczema at 1 year of age, the risk of
eczema at 1 year of age increased by 1.14 times (95%CI: 1.06-1.23) for
per 10 percentiles increased in the WQS index of combined exposure to
pollutants. O3 in pregnancy still played a major role
(Figure S3). In the WQS model of the effects of pollutant exposure
during pregnancy and 2 years after birth on the cumulative eczema risk
within two years, for per 10 percentiles increased in the WQS index of
pollutant combined exposure, the cumulative eczema risk of children
before two years of age increased by 1.11 times (95%CI: 1.04-1.20).
O3 in pregnancy still played a major role (Figure S4).
There was no significant difference between the sensitivity analysis
results and the main results of this study. Secondly, the number of
bootstrap (b) samples used in the parameter estimation of the model were
set to 100, 1000, 2000 and 3000 respectively (Figure S5, Figure S6).
After 1000 times bootstrap, the model results were relatively stable.
The WQS model had robustness.