Table 4.
Meta-regression of the effects of the duration of tannin source supplementation on measured growth outcomes.
| Variable a | Model Results | Heterogeneity b | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 95% CI | TM | Mixed Model Effects | ||||||||
| Estimate | SE | p-Value | Lower | Upper | QM | τ2 | τ | I2 (%) | R2 | |
| ADFI, g/day | ||||||||||
| GMTA | −0.0113 | 0.0945 | 0.9048 | −0.1965 | 0.1739 | 0.0143 | 2.8266 | 1.6813 | 96.63 | 0.00 |
| ADG, g/day | ||||||||||
| Chestnut | −3.2762 | 0.2604 | <0.0001 | −3.7866 | −2.7659 | 158.2981 | 0.8039 | 0.8966 | 83.26 | 99.40 |
| GMTA | −1.6715 | 0.1233 | <0.0001 | −1.9132 | −1.4299 | 183.7752 | 0.00 | 0.00 | 0.00 | 100.00 |
| FBW, kg | ||||||||||
| Chestnut | −1.6715 | 0.1233 | <0.0001 | −1.9132 | −1.4299 | 183.7752 | 0.00 | 0.00 | 0.00 | 100.00 |
| FCR | ||||||||||
| GMTA | −0.2836 | 0.0767 | 0.0002 | −0.4339 | −0.1333 | 13.6825 | 1.7732 | 1.3316 | 91.34 | 69.89 |
a ADFI: average daily feed intake; ADG: average daily gain; FBW: final body weight; FCR: feed conversion ratio; GMTA: gallnut microencapsulated tannic acid. b SE: standard error; CI: confidence interval; TM: test of moderators; QM: model sum of squares; I2: Higgens statistics; τ2: heterogeneity variance of true effect size; τ: standard deviation of true effect size; R2: percentage of variation explained by the model.