Table 3.
Change in Tetanus antibody concentration (IU/mL) in two elderly groups supplemented with the dairy and soy protein.
| Soy | Tetanus Antibodies (IU/mL) | ||
|---|---|---|---|
| Week 0 | Week 8 | Week 8 - Week 0 | |
| 1 | 0.65 | 3.60 | 2.95 |
| 2 | 2.73 | 6.26 | 3.53 |
| 3 | 0.64 | 7.73 | 7.09 |
| 4 | 0.85 | 5.14 | 4.29 |
| 5 | 0.69 | 16.00 | 15.31 |
| 6 | 0.80 | 12.98 | 12.18 |
| 7 | 2.31 | 7.66 | 5.35 |
| 8 | 2.37 | 15.70 | 13.33 |
| 9 | 1.20 | 4.59 | 3.39 |
| 10 | 1.09 | 4.75 | 3.66 |
| 11 | 1.35 | 8.32 | 6.97 |
| Mean ± SEM | 1.33 ± 0.23 | 8.43 ± 1.35** | 7.10 ± 1.34* |
| Dairy | Week 0 | Week 8 | Week 8 - Week 0 |
| 1 | 1.01 | 6.58 | 5.57 |
| 2 | 0.91 | 11.90 | 10.99 |
| 3 | 0.30 | 11.90 | 11.60 |
| 4 | 1.54 | 10.70 | 9.16 |
| 5 | 0.88 | 8.84 | 7.96 |
| 6 | 1.22 | 16.00 | 14.78 |
| 7 | 0.59 | 9.62 | 9.03 |
| 8 | 1.02 | 16.00 | 14.98 |
| 9 | 0.73 | 13.00 | 12.27 |
| 10 | 0.38 | 16.00 | 15.62 |
| Mean ± SEM | 0.86 ± 0.12 | 12.05 ± 1.03** | 11.20 ± 1.05* |
*
Average change in antibody levels (week 8 - week 0) is significantly different between groups (p = 0.029).
**
Average post-vaccine antibody level is higher at week 8 in dairy group compared to soy group (p = 0.034).
A multiple linear regression was conducted to explore the relationship between antibody level changes and volunteer age and sex and no effects were seen.