Table 2 Subgroup analysis of prevalence of aneemia among pregnant women in Sub-Saharan Africa
Subgroup | No. of included studies | Prevalence(95%CI) | Heterogeneity Statistics | Tau Squared | P value | I2 | Â |
|---|---|---|---|---|---|---|---|
By Sub- region | |||||||
 Eastern Africa | 17 | 33.9 (0.252,0.438) | 1273.69 | 0757 | < 0.000 | 98.85 |  |
 Western Africa | 8 | 39.3 (0.231,0582) | 877.78 | 0.856 | < 0.000 | 98.35 |  |
Overall | |||||||
 By study type | |||||||
  Facility based | 21 | 41.4 (0.262,0.584) | 2150.608 | 0.903 | < 0.000 | 99.07 |  |
  Community based | 4 | 34.5 (345,0.258) | 97.35 | 0.389 | < 0.000 | 96.91 |  |