CD40LG and preterm premature rupture of the membranes: Model 3 showed a 1.87 times greater risk of NRDS in males compared to females, which was independent after correcting for GA, birth weight, WBC, PLT, CRP, total IgM, GDM, antenatal steroids, PPROM and meconium-stained amniotic fluid (P < 0.05).