Review Article
The Association of Inflammatory Biomarker of Neutrophil-to-Lymphocyte Ratio with Spontaneous Preterm Delivery: A Systematic Review and Meta-analysis
Table 2
Outcomes of subgroup analysis for association between NLR and preterm delivery.
| | Subgroups | Number of studies | WMD (95% CI) | |
| | Definition of preterm delivery | Before 37 weeks | 13 | 1.02 (0.40, 1.63) | 91.82% | | Before 34 weeks | 2 | 1.20 (-0.07, 2.47) | 0.0% | | Study design | Case-control | 11 | 1.11 (0.39, 1.83) | 92.72% | | Cross-sectional | 3 | 2.30 (-7.08, 11.68) | 94.62% | | Cohort | 1 | 1.30 (0.42, 2.18) | — | | Study country | Turkey | 7 | 0.86 (0.04, 1.68) | 92.69% | | South Korea | 3 | 1.10 (-2.67, 4.87) | 92.87% | | Other | 5 | 1.95 (-0.85, 4.75) | 92.93% |
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