Table 2.

Richness index, diversity index of gut microbiota and SCFAs difference between prenatal depression and non-depression group (N = 86).

Item	Non-depression group (N = 43)	Prenatal depression group (N = 43)	P
Sobs index	256 (307, 198)	259 (324, 222)	0.371
Shannon index	3.43 (3.80, 3.12)	3.51 (3.69, 3.21)	0.509
Simpson index	0.08 (0.10, 0.05)	0.07 (0.09, 0.05)	0.914
Ace index	307.76 (377.80, 245.20)	313.78 (385.07, 261.68)	0.566
Chao index	305.88 (377.48, 248.55)	317.09 (398.44, 260.53)	0.349
Coverage index	0.9981 (0.9984, 0.9976)	0.9981 (0.9985, 0.9976)	0.976
Acetic acid, ug/mg	0.78 (0.89, 0.58)	0.93 (1.19, 0.68)	0.023*
Propanoic acid, ug/mg	0.55 (0.77, 0.44)	0.78 (1.01, 0.54)	0.005**
Isobutyric acid, ug/mg	0.09 (0.13, 0.05)	0.09 (0.13, 0.05)	0.566
Butanoic acid, ug/mg	0.65 (0.92, 0.44)	0.89 (1.13, 0.57)	0.047*
Isovaleric acid, ug/mg	0.08 (0.13, 0.04)	0.08 (0.15, 0.04)	0.390
Valeric acid, ug/mg	0.14 (0.22, 0.03)	0.16 (0.28, 0.05)	0.233
Isohexanoic acid, ug/mg	0.003 (0.005, 0.001)	0.004 (0.006, 0.002)	0.282
Hexanoic acid, ug/mg	0.003 (0.014, 0.002)	0.005 (0.057, 0.003)	0.082

Note: NA means Not Applicable. * means 0.01 ≤ P < 0.05. ** means 0.001 ≤ P < 0.01.

The data that were not normally distributed are shown in M (IQR).