[Retracted] Relationship between Platelet-to-Lymphocyte Ratio and Lymphocyte-to-Monocyte Ratio with Spontaneous Preterm Birth: A Systematic Review and Meta-analysis

Table 2

PLR subgroup analysis.

Variables	No. of studies	SMD (95% CI)		Heterogeneity		Model
				(%)	pH
Country
Asia	5	0.77 (-0.03, 1.57)	0.059	92.5	<0.001	Random
Non-Asia	4	0.28 (0.17, 0.40)	<0.001	0	0.482	Fixed
Case number
<100	3	0.94 (-0.30, 2.18)	0.136	96.5	<0.001	Fixed
≥100	5	0.22 (0.06, 0.38)	0.008	58.5	0.047	Fixed
CBC test
Upon admission	5	0.87 (0.11, 1.62)	0.025	95.2	<0.001	Fixed
Other	4	0.11 (-0.15, 0.38)	0.39	92.5	<0.001	Fixed
Study design
Prospective case control	2	-0.10 (-0.39, 0.19)	0.499	0	0.508	Fixed
Retrospective case control	7	0.65 (0.24, 1.06)	0.002	93.9	<0.001	Random