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Study outcomes selected for analysis1
| Variable | Units | Measures/estimates extracted | Type of design |
| ADG | g or kg | Mean, n, SE/SD | Randomized controlled trial |
| ADFI | g or kg | Mean, n, SE/SD | Randomized controlled trial |
| G:F | g/kg or g/g | Mean, n, SE/SD | Randomized controlled trial |
ADFI, average daily feed intake; ADG, average daily growth; G:F, gain to feed ratio.
