Table 5.
Covariates | Incidence ratio | 95% IC | p-value | ||
---|---|---|---|---|---|
Environmental risk | Low ≤0.66 (n = 114) | 1 | |||
Median]0.66-4.81] (n = 219) | 2.14 | 1.15; 3.98 | 0.016 | <10-3 | |
High >4.81 (n = 96) | 6.89 | 3.50; 13.57 | <10-3 | ||
sHLA-G level in peripheral blood of infant | Null (n = 217) | 1 | |||
Low (n = 170) | 1.07 | 0.65; 1.77 | 0.775 | 0.06 | |
High (n = 42) | 2.29 | 1.12; 4.66 | 0.022 | ||
Age of infant (month) | 3 (n = 139) | ||||
6 (n = 95) | 2.26 | 1.19; 4.27 | 0.012 | <10-3 | |
9 (n = 99) | 4.06 | 2.27; 7.28 | <10-3 | ||
12 (n = 96) | 2.76 | 1.56; 4.89 | <10-3 |
Covariates included in multivariate mixed regression of Poisson were environmental risk, sHLA-G quantification in peripheral blood of infant, age, and placental infection. Covariates with significant p values were presented in the Table 5.