Table 5. Effects of farming characteristics on HPAI vaccination practices.
| Variables | Vaccination practices a | Booster dose practices b | ||||
|---|---|---|---|---|---|---|
| Coef. | Odds ratio | Sig. | Coef. | Odds ratio | Sig. | |
| Types of livestock | ||||||
| Poultry | - | - | - | - | - | - |
| Mixed livestock | 0.418 | 0.658 | 0.412 | 1.547 | 4.696 | 0.150 |
| Number of chickens | 0.020* | 1.021 | 0.018 | 0.025* | 1.025 | 0.021 |
| Chick sources | ||||||
| Chicks at the farm | - | - | - | - | - | - |
| Hatchery | −39.824 | 0.000 | 0.999 | −35.181 | 0.000 | 0.999 |
| From other farms | −39.007 | 0.000 | 0.999 | −36.381 | 0.000 | 0.999 |
| From companies | −39.405 | 0.000 | 0.999 | −20.386 | 0.000 | 1.000 |
| Raising purpose | ||||||
| Selling meat | - | - | - | - | - | - |
| For selling eggs | 28.881 | 3.490e+12 | 1.000 | 55.964 | 2.019e+24 | 1.000 |
| For consumption | -1.244* | 0.288 | 0.021 | -3.372 | 0.034 | 0.088 |
| Mixed | −21.49 | 0.000 | 0.999 | −17.10 | 0.000 | 0.999 |
| Farming system | ||||||
| Seasonal farming | - | - | - | - | - | - |
| Semi-intensive farming | −40.334 | 0.000 | 0.991 | −15.118 | 0.000 | 0.999 |
| Mixed | 21.093 | 1.446e+6 | 0.998 | 16.744 | 1.870e+4 | 0.999 |
| Raising methods | ||||||
| Free-range farming | - | - | - | - | - | - |
| Semi-free-range farming | −2.271 | 0.103 | 0.124 | 32.177 | 9.422e+10 | 0.999 |
| Caging farming | −2.401 | 0.091 | 0.133 | 32.628 | 1.479e+11 | 0.999 |
| HPAI availability | ||||||
| No | - | - | - | - | - | - |
| Yes | 0.635 | 1.887 | 0.452 | −2.063 | 0.127 | 0.079 |
| Vaccination | ||||||
| No vaccination | - | - | - | - | - | - |
| First dose of vaccination | - | - | - | 3.069** | 21.527 | 0.008 |
| Constant | −1.730 | 0.177 | 1.000 | −37.44 | 0.000 | 0.998 |
Coef.: co-efficiency; Sig.: significant. *, significant at p < 0.05; **, significant at p < 0.01. The Nagelkerke R2 for HPAI vaccination practices was 57.4%, and for HPAI, the boosted dose practice was 78.3%. a For HPAI vaccination practices, the baseline was set as “vaccinated,” where “vaccinated” includes 65 respondents and “not vaccinated” includes 101 respondents. b For HPAI booster dose practices, the baseline was set as “Yes,” where “Yes” includes 36 respondents and “No” includes 130 respondents.