Table 3. Results of fitting the three models contained in the nested model structure.
| Parameters | -LL | AICC | |||||
|---|---|---|---|---|---|---|---|
| Model | p* | δ* | σ | λ0 | λ1 | ||
| MSF | 0 | NA | 2.54 | 0.78, 1.69 | NA | 314.3 | 634.6 |
| MSFSF1 | 1 | 4 | 2.71 | 1.80, 3.10 | 1.80, 3.10 | 314.8 | 635.6 |
| MSFSF2 | 1 | 4 | 2.78 | 1.53 | 3.98 | 316.0 | 637.9 |
p = proportion that loses antibodies post primary infection; δ = rate of loss of antibodies post primary infection; σ = rate of loss of maternal antibodies; λ0 = primary force of infection; λ1 = secondary force of infection; -LL = the negative log likelihood value, the lower the value the better the model; AICc = the second order Akaike information criterion.
* These parameters are fixed (not estimated). All rates are per person per year.