TABLE 2.
Concordance in anemia severity based on hemoglobin and hematocrit among first-trimester pregnancies, Kaiser Permanente Northwest, 2005–20161
| Hematocrit, n |
||||
|---|---|---|---|---|
| Hemoglobin | No anemia (≥33%) | Mild (30–32.9%) | Moderate/severe (<30%) | Total, n (%) |
|
| ||||
| No anemia (≥11.0 g/dL) | 37,878 | 344 | 0 | 38,222 (98.2) |
| Mild (10–10.9 g/dL) | 222 | 323 | 13 | 558(1.4) |
| Moderate/severe (<10 g/dL) | 7 | 74 | 62 | 143 (0.4) |
| Total, n (%) | 38,107 (97.9) | 741 (1.9) | 75(0.2) | 38,923 |
| Concordance criteria | n 2 | % | ||
| Anemia by Hgb (<11 g/dL) or Hct (<33%) | 38,923 | 98.5 | ||
| Anemia by Hgb (<11 g/dL) and Hct (<33%) among pregnancies with anemia | 1045 | 45.2 | ||
| Anemia severity by Hgb or Hct | 38,923 | 98.3 | ||
| Anemia severity by Hgb and Hct among pregnancies with anemia | 1045 | 36.8 | ||
1
Mild, moderate, and severe classifications based on the Hgb definitions (5, 18) and the 3:1 ratio for Hgb/Hct (18, 19). For comparison to Hct, Hgb was not adjusted for smoking or elevation. Hct, hematocrit; Hgb, hemoglobin.
2
Denominator 38,923 includes all pregnancies with both laboratory tests. Denominator 1045 excludes pregnancies identified as not anemic by both Hgb and Hct.