. Author manuscript; available in PMC: 2022 Jun 1.

Published in final edited form as: Int J Gynaecol Obstet. 2021 Jan 5;153(3):533–541. doi: 10.1002/ijgo.13514

TABLE 2.

Effects of selenium supplementation on the primary and secondary end points (n = 180)

Endpoint	Selenium (n = 90)	Placebo (n = 90)	P value
Pregnancy duration at delivery
Preterm (<37 weeks)	5 (5.6)	14 (15.6)	0.091
Term (≥37 weeks)	73 (81.1)	66 (73.3)
Drop-out/incomplete data	12 (13.3)	10 (11.1)
Delivery weight for term neonates^b
<2500 g	2 (2.4)	7 (9.2)	0.167
≥ 2500 g	71 (83.5)	59 (77.6)
Drop-out/incomplete data	12 (14.1)	10 (13.2)
Perinatal death
Dead	2 (2.2)	2 (2.2)	0.932^c
Alive	76 (84.4)	78 (86.7)
Drop-out/incomplete data	12 (13.3)	10 (11.1)
Adverse event
Yes	17 (18.9)	17 (18.9)	0.898
No	61 (68.7)	63 (70.0)
Drop-out/incomplete data	12 (13.3)	10 (11.1)

Abbreviations: CI, confidence interval; RR, relative risks.

Values are given as number (percentage).

n = 161.

Fisher exact test.