Table 1. The mean, SD, minimum (Min), and maximum (Max) values of measured and estimated traits of pig carcasses in all abattoirs

Abattoir A (N = 400,280) Abattoir B (N = 416,092) Abattoir C (N =252,647)
Mean SD Min Max Mean SD Min Max Mean SD Min Max
Measured traits
 Backfat thickness (mm) 23.282 4.894 0.000 56.000 22.844 4.971 3.000 55.000 22.602 4.790 0.000 77.000
 Carcass weight (kg) 90.195 6.568 37.000 154.000 86.777 7.268 35.000 140.000 88.419 6.151 38.000 130.000
Estimated traits
 Backfat thickness (mm) 23.398 4.878 5.000 45.000 23.181 4.910 5.000 45.000 22.672 4.645 5.000 43.000
 Backfat thickness in the 11th/ 12th thoracic vertebra (mm) 24.775 5.018 5.000 48.000 23.343 5.085 5.000 48.000 23.234 4.946 5.000 48.000
 Backfat thickness in the 14th thoracic vertebra/1st lumbar vertebra (mm) 23.051 4.759 5.000 45.000 23.014 4.516 5.000 45.000 22.119 4.646 5.000 45.000
 Backfat thickness in the 7th multifidus muscle (mm) 17.814 4.951 3.000 44.000 18.011 4.686 3.000 45.000 16.283 4.621 3.000 41.000
 Backfat thickness in the 1st/ 2th thoracic vertebra (mm) 39.030 4.759 20.000 64.000 38.283 4.962 19.000 64.000 38.461 4.760 19.000 64.000
 Carcass weight (kg) 92.628 7.874 54.000 115.200 88.157 7.601 54.000 115.200 89.290 6.811 54.000 115.200
 Front weight (kg) 27.648 1.984 18.162 34.838 26.381 2.198 18.162 34.838 27.618 1.866 18.162 34.838
 Middle weight (kg) 33.836 3.117 21.206 47.104 32.502 3.308 21.206 47.104 32.650 2.805 21.206 47.104
 Rear weight (kg) 26.086 1.914 16.792 32.728 25.604 2.074 16.792 32.728 25.574 1.764 16.792 32.728
 Rib weight (kg) 3.969 0.350 2.090 5.476 3.845 0.382 2.090 5.476 4.034 0.314 2.090 5.476
 Rib trim weight (kg) 3.053 0.264 1.306 4.028 2.857 0.269 1.306 4.028 2.971 0.248 1.306 4.028
 Rib meat weight (kg) 2.270 0.208 0.993 3.155 2.164 0.210 0.993 3.155 2.243 0.207 0.993 3.155
 Neck weight (kg) 5.927 0.437 3.470 7.662 5.525 0.482 3.470 7.662 5.855 0.424 3.470 7.662
 Neck trim weight (kg) 4.669 0.365 2.823 5.975 4.423 0.400 2.823 5.975 4.605 0.336 2.823 5.975
 Neck meat weight (kg) 3.495 0.259 1.836 4.800 3.385 0.291 1.836 4.800 3.469 0.251 1.836 4.800
 Shoulder weight (kg) 11.897 0.954 6.959 15.557 11.421 1.094 6.959 15.557 11.651 0.890 6.959 15.557
 Shoulder trim weight (kg) 8.673 0.667 5.170 11.356 8.252 0.730 5.170 11.356 8.434 0.635 5.170 11.356
 Shoulder meat weight (kg) 6.357 0.545 3.566 9.082 6.186 0.582 3.566 9.082 6.373 0.510 3.566 9.082
 Foreshank weight (kg) 1.846 0.175 0.848 2.618 1.801 0.215 0.848 2.618 1.907 0.156 0.848 2.618
 Front meat weight (kg) 14.561 1.294 8.635 19.657 14.013 1.340 8.635 19.657 14.352 1.197 8.635 19.657
 Tenderloin weight (kg) 1.692 0.134 0.871 2.269 1.636 0.143 0.871 2.269 1.635 0.125 0.871 2.269
 Tenderloin trim weight (kg) 1.095 0.093 0.513 1.595 1.064 0.099 0.513 1.595 1.083 0.089 0.513 1.595
 Tenderloin meat weight (kg) 1.085 0.113 0.482 1.650 1.070 0.117 0.482 1.650 1.049 0.103 0.482 1.650
 Belly weight (kg) 16.893 1.728 9.566 23.688 15.927 1.798 9.566 23.688 15.926 1.558 9.566 23.688
 Belly trim weight (kg) 11.864 1.140 6.692 16.584 11.446 1.254 6.692 16.584 11.403 1.022 6.692 16.584
 Belly meat weight (kg) 7.879 0.654 4.104 10.564 7.546 0.712 4.104 10.564 7.627 0.602 4.104 10.564
 Belly fat weight (kg) 4.074 0.925 0.488 8.552 3.879 0.833 0.488 8.552 3.942 0.804 0.488 8.552
 Belly rate (%) 47.616 4.333 25.980 67.360 47.396 3.844 25.980 67.360 46.922 3.856 25.980 67.360
 Belly trim rate (%) 66.362 5.185 40.450 89.840 67.939 4.888 40.450 89.840 67.669 4.801 40.590 89.840
 10-cm neck fat thickness (mm) 19.944 4.436 4.000 43.000 20.233 4.212 4.000 43.000 20.166 4.019 4.000 43.000
 Intra-fat thickness (mm) 5.384 1.514 1.000 21.000 5.387 1.475 1.000 22.000 5.959 1.399 1.000 22.000
 Diaphragm weight (kg) 0.299 0.026 0.168 0.418 0.296 0.028 0.168 0.418 0.296 0.023 0.168 0.418
 Loin weight (kg) 10.086 0.961 5.649 14.479 9.663 1.002 5.649 14.479 9.750 0.877 5.649 14.479
 Loin trim weight (kg) 7.926 0.683 4.228 11.208 7.699 0.717 4.228 11.208 7.897 0.652 4.228 11.208
 Loin meat weight (kg) 7.085 0.719 3.070 10.274 6.719 0.715 3.070 10.274 6.741 0.620 3.070 10.274
 Middle meat weight (kg) 17.591 1.367 9.872 23.380 17.022 1.532 9.872 23.380 17.228 1.279 9.872 23.380
 Ham weight (kg) 19.728 1.514 11.561 25.419 19.427 1.686 11.561 25.419 19.178 1.391 11.561 25.419
 Ham trim weight (kg) 16.603 1.458 9.554 22.436 16.141 1.449 9.554 22.436 15.967 1.275 9.554 22.436
 Ham meat weight (kg) 14.477 1.374 8.032 20.596 14.144 1.297 8.032 20.596 13.872 1.212 8.032 20.596
 Hindshank weight (kg) 2.381 0.193 1.376 3.032 2.260 0.194 1.376 3.032 2.317 0.179 1.376 3.032
 Rear meat weight (kg) 16.634 1.383 9.285 23.311 16.063 1.414 9.285 23.311 16.138 1.262 9.285 23.311
 Total skin weight (kg) 6.308 0.352 4.321 8.115 6.127 0.402 4.321 8.115 6.113 0.343 4.321 8.115
 Total fat weight (kg) 24.105 4.153 6.742 45.354 22.713 4.085 6.742 45.354 22.937 3.887 6.742 45.354
 Total bone weight (kg) 5.854 0.445 3.689 8.003 5.667 0.436 3.689 8.003 5.783 0.422 3.689 8.003
 Total meat weight (kg) 48.299 3.865 29.298 64.838 47.492 4.604 29.298 64.838 47.812 3.806 29.298 64.838
 Lean meat percentage (%) 55.983 3.811 38.060 71.850 56.984 3.674 38.060 71.850 55.468 3.439 38.060 71.850