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. Author manuscript; available in PMC: 2021 Apr 1.
Published in final edited form as: Ann Allergy Asthma Immunol. 2020 Jan 13;124(4):342–349. doi: 10.1016/j.anai.2020.01.001

Table 5.

Examining potential effect modification in the association between race and continuous allergic outcomes at age 10.

Effect Modifier Total IgE FEV1 (% Predicted) FVC (% Predicted) FEV1/FVC Ratio FEF 25–75 (% Predicted)
Interaction p-value1
Mode of delivery 0.0032 0.51 0.72 0.0544 0.0675
First born child 0.56 0.20 0.52 0.37 0.19
Child sex 0.61 0.32 0.38 0.74 0.18
Prenatal indoor dog(s) 0.0903 0.69 0.36 0.64 0.81
Ever breastfed their child 0.93 0.72 0.70 0.43 0.59
1

Interaction term added to the fully-adjusted imputation model, with IPW (N=481).

2

Significant racial difference in c-section born children only: β (SE)=0.69 (0.35), p=0.049; β (SE)=−0.02 (0.27), p=0.94; in those born via c-section and vaginally, respectively.

3

Non-significant racial differences in both subgroups: β (SE)=0.73 (0.38), p=0.054; β (SE)=−0.20 (0.28), p=0.49; in children exposed and unexposed to dogs, respectively.

4

Significant racial difference in c-section born children only: β (SE)= −4.25 (1.89), p=0.024; β (SE)= −0.33 (1.36), p=0.81; in those born via c-section and vaginally, respectively.

5

Non-significant racial differences in both subgroups: β (SE)= −9.51 (6.62), p=0.15; β (SE)= 7.43 (5.24), p=0.16; in those born via c-section and vaginally, respectively.