Table 1 Details of microbiome studies considered in the present analysis.

From: First-trimester vaginal microbiome diversity: A potential indicator of preterm delivery risk

Study (No. of subjects)

Reference

No. of term samples

No. of preterm samples

16S variable region amplified for sequencing

Study 1 (37)

DiGiulio et al., PNAS, Sep 2015 (doi:10.1073/pnas.1502875112)

517

181

V3–V5

Study 2 (41)

Romero et al., Microbiome, May 2014 (doi:10.1186/2049-2618-2-18)

163

43

V1–V3

Study 3 (22)

Romero et al., Microbiome, Feb 2014 (doi:10.1186/2049-2618-2-4)

139

—

V1–V3

Study 4 (173)

https://www.ncbi.nlm.nih.gov/bioproject/?term=prjeb10913 (Project id: PRJEB10913)

578

—

V4–V5

  1. Only those microbiome samples were considered that had at least 500 taxonomically assigned sequences and were collected from pregnant women within 40 weeks of gestation.
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