Table 2.
Descriptive data for all continuous variables included in the analysis.
| Independent variable | N | Mean | St. Dev. | Minimum | Maximum | Median |
|---|---|---|---|---|---|---|
| Experimental initial age (d) | 749 | 16 | 13 | 1 | 44 | 14 |
| Experimental duration (d) | 749 | 17 | 12 | 6 | 61 | 13 |
| Stocking density (kg/m2) | 749 | 21 | 13 | 0.6 | 62 | 20 |
| Group size (n) | 749 | 284 | 1,879 | 4 | 23,000 | 60 |
| Duration of photoperiod (h) | 749 | 20 | 4 | 6 | 24 | 22 |
| Response variable | ||||||
| ADG (g/d) | 679 | 64.88 | 24.23 | 11.65 | 123.53 | 65.29 |
| ADFI (g/d) | 664 | 120.18 | 58.57 | 16.99 | 321.10 | 117.62 |
| FCR (g:g) | 670 | 1.80 | 0.40 | 0.91 | 3.65 | 1.75 |
| Mortality (%) | 334 | 2.95 | 2.75 | 0.00 | 18.79 | 2.22 |
| Gait score (mean) | 39 | 1.27 | 0.72 | 0.01 | 3.0 | 1.31 |
| Rest (%) | 49 | 66.12 | 14.47 | 20.96 | 86.58 | 70.91 |
| Eat (%) | 49 | 12.51 | 6.91 | 5.16 | 27.90 | 10.64 |
| Drink (%) | 49 | 6.24 | 1.68 | 1.99 | 11.28 | 6.14 |
| Stand (%) | 25 | 4.17 | 1.73 | 1.39 | 8.38 | 3.85 |
| Walk (%) | 27 | 3.27 | 2.58 | 0.50 | 9.24 | 2.36 |