Table 3.
Log2 Respiratory Syncytial Virus and Log2 Influenza Antibody Cord Blood to Maternal Blood Ratios for Seattle, Washington, and Yukon-Kuskokwim Delta, Alaska, Mother–Infant Pairs.
| Antibody Ratio | Seattle, Washington | Yukon-Kuskokwim Delta, Alaska | P Value |
|---|---|---|---|
| Respiratory syncytial virus neutralizing antibody | N = 57 | N = 75 | … |
| CB:MB ratio, mean (SD) | 1.15 (0.13) | 1.04 (0.08) | <.001 |
| Influenza hemagglutination inhibition assay antibody | N = 57 | N = 53 | … |
| H3N2 | |||
| CB:MB ratio, mean (SD) | 1.22 (0.53) | 1.05 (0.65) | .17 |
| H1N1 | |||
| CB:MB ratio, mean (SD) | 1.38 (0.51) | 1.35 (1.35) | .87 |
| B-Yamagata | |||
| CB:MB ratio, mean (SD) | 1.42 (0.54) | 1.59 (1.22) | .38 |
| B/Victoria | |||
| CB:MB ratio, mean (SD) | 1.32 (0.58) | 1.51 (0.91) | .24 |
Abbreviations: CB:MB = cord blood to maternal blood ratio; SD = standard deviation.