Statistical analysis
The relationship between cord blood soluble FasL and atopic outcomes was analyzed using an independent t-test. Univariate and multivariate logistic regression analyses were used to analyze the risk factors and confounding factors of allergic disease outcomes in 7-year-old children. During the univariate logistic regression, variables with ap- value less than 0.1 were included in the subsequent multivariate logistic regression. The relationships between cord blood soluble FasL and FeNO/D. pteronyssinus -specific IgE were analyzed by linear regression. All hypothesis testing was two-sided with a priori levels of significance set at p < 0.05. Statistical analyses were performed with IBM SPSS Statistics for Windows, version 20 (IBM Corp., Armonk, N.Y., USA).