Table 3.

The α diversity and OTUs of gut microbiome in four groups.

	Pre-BMI <24 kg/m2		Pre-BMI ≥24 kg/m2		T value or Zvalue
	Non-GDM (n = 71)	GDM (n = 27)	Non-GDM (n = 17)	GDM (n = 7)	P value
Ace index (M(P25–P75))	1655.5 (792.2–25222.3)	1711.26 (747.6–2642.6)	1157.4 ± 684.6	1687.8 ± 737.8	Z1 = −0.20, P1 = 0.84, Z2 = −1.89, P2 = 0.06, T3 = 0.06, P3 = 0.96, Z4 = −1.75, P4 = 0.08
Chao index (M(P25–P75))	1234.0 (686.1–1713.9)	1318.1 (744.1–1983.1)	914.2 (528.8–1247.9)	1231.1 (743.7–1756.6)	Z1 = −0.54, P1 = 0.59, Z2 = −1.80, P2 = 0.07, Z3 = −0.15, P3 = 0.88, Z4 = −1.68, P4 = 0.10
Shannon index (M(P25–P75))	4.2 (3.89–4.76)	4.29 ± 0.77	4.00 ± 0.71	4.13 ± 0.53	Z1 = −0.52, P1 = 0.60, Z2 = −1.16, P2 = 0.25, T3 = 0.51, P3 = 0.61, T4 = −0.41, P4 = 0.69
Simpson index (M(P25–P75))	0.068 (0.027–0.082)	0.068 (0.025–0.091)	0.071 (0.03–0.11)	0.059 (0.03–0.078)	Z1 = −0.44, P1 = 0.66, Z2 = −0.41, P2 = 0.68, Z3 = −0.83,P3 = 0.41, Z4 = −0.48, P4 = 0.63
OTUs (M(P25–P75))	740.9 (470–1010)	776.5 (514–1030)	580.4 (352–760.5)	745.1 (462–1126)	Z1 = −0.48, P1 = 0.63, Z2 = −1.84, P2 = 0.07 Z3 = −0.02, P3 = 0.98, Z4 = −1.56, P4 = 0.12

Z value, T value, and P value are the same as those group compared in Table 2.