Fig. 5From: Finding the priority and cluster of inflammatory biomarkers for infectious preterm birth: a systematic reviewThe forest plot of comparison of maternal TNF/NGF family related factors between normal and PTB patients in 25–33 weeks. SMD: 1.592; 95% CI: 0.020 to 3.163; P < 0.05, and I2 = 98.4%. (SMD indicated standard mean difference; CI indicated confidence interval)Back to article page