Table II.
The relationship between maternal anemia and LBW in the first trimester based on the continent and study type
| Variable | Number of studies | OR | 95%CI | I 2 % | P (heterogeneity) | |
|---|---|---|---|---|---|---|
| Type of study | ||||||
| Cohort | 9 | 1 .20 | 0.98-1.46 | 69.8 | 0.001 | |
| Case-control | 2 | 2.40 | 1.62-3.55 | 0.0 | 0.481 | |
| Cross-sectional | 1 | 0.72 | 0.52-0.99 | - | - | |
| Mixture of studies | 12 | 1.26 | 1.03-1.55 | 77.5 | 0.000 | |
| Continent | ||||||
| Asia | 10 | 1 .13 | 0.93-1.37 | 72.9 | 0.000 | |
| Africa | 1 | 2.23 | 1.44-3.46 | 0 | - | |
| Europe | 1 | 3.14 | 1.35-7.29. | 0 | - | |
| Aggregate of continents | 12 | 1.26 | 1.03-1.55 | 77.5 | 0.000 | |
OR: odds ratio
CI: confidence interval
P: p-value