Figure 2.

Boxplots showing different alpha diversity measures between preterm (PTB) and term birth (TB) samples in 1st trimester of pregnancy (T1)

Alpha diversity was found to be significantly higher in PTB group compared to TB group for (A) Chao1 index (p value <0.05) (B) Shannon index (p value < 0.01), (C) Simpson index (p value < 0.01). The alpha diversity index was represented by box-and-whisker plot where the box indicates the interquartile range (IQR). The median value is represented as a line within the box and whiskers extend to the extreme (highest and lowest) value that is within 1.5∗IQR.