Results
The proportion of HbSS phenotype was similar in the group with FEV1% predicted ≥ 65 and the group with FEV1% predicted < 65, as was the proportion of HbSC phenotype (Table 1). Additionally, maternal parity was similar in the two FEV1% predicted groups. Moreover, the two FEV1% predicted groups were similar with respect to the mean maternal ages, gestational ages, maternal BMI, and hemoglobin concentrations. The mean FVC % predicted and FEV1/FVC % predicted were higher in the FEV1% predicted ≥ 65 group compared with the FEV1% predicted < 65 group.