Variable | Criteria | Specificity (%) 1 | Relevance (confidence interval) 2 | Item-total correlation 3 | ||
GA x GC | GAA X GC | GCA x GC | ||||
Positioning in the stall | The horse’s head is at the outside door | 78.3 | 18.6 (4.4-78.9)* | 48.3 (10.0-233.1)* | 0.1 (0–0.4) | 0.4 |
The horse is inside the stall, but looking at the outside door, observing the environment | 19.5 | 0.6 (0.2-2.0) | 0.1 (0.0-0.7) | 1.9 (0.6-6.16) | ||
The horse is eating | 0.9 | NE | NE | NE | ||
The horse is not close to the outside stall door and does not look interested in the environment | 0.9 | NE | NE | NE | ||
Head position | Above the withers or grazing | 95.0 | NE | NE | NE | 0.2 |
At the level of the withers | 3.3 | NE | NE | NE | ||
Below the withers but not eating | 0.0 | NE | NE | NE | ||
Response to opening the door | The horse moves towards the door or is already positioned at the outside door | 15.8 | 1.0 (0.2-3.7) | 1.5 (0.4-6.0) | 1.9 (0.6-6.5) | 0.3 |
The horse looks at the door, but does not move towards the door | 15.8 | 0.7 (0.2-3.3) | 0.3 (0–1.7) | 0.5 (0.1-1.7) | ||
The horse does not respond to opening the door | 1.7 | NE | NE | NE | ||
Response to approach and presence of the observer | Moves towards or looks to the observer | 84.7 | 0.3 (0.1-1.5) | 0.2 (0.1-0.9) | 1.4 (0.3-6.1) | 0.2 |
Moves away from the observer | 2.5 | NE | NE | NE | ||
Does not move | 12.7 | 3.8 (0.8-18.8) | 4.6 (1.0-21.2)* | 0.7 (0.1-3.7) | ||
Appetite for hay | The horse eats hay | 99.1 | NE | NE | NE | 0.2 |
The horse does not eat hay | 0.8 | NE | NE | NE | ||
Response to concentrate food | Moves to the food and eats | 90.7 | NE | NE | NE | 0.2 |
Hesitates to move towards the food, but eats | 8.0 | NE | NE | NE | ||
Shows no interest in food, not eating | 0 | NE | NE | NE | ||
Locomotion | The horse moves freely alone | 84.2 | 47.6 (4.9-464.0)* | 5.8 (1.6-21.3)* | 0.2 (0–0.6) | 0.4 |
The horse does not move, or is reluctant to move | 10.0 | 0 (0–0.2) | 0.2 (0.1-0.7) | 6.2 (1.6-23.2)* | ||
The horse is agitated, restless | 5.8 | NE | NE | NE | ||
Locomotion when led by the evaluator | The horse moves freely when led | 86.5 | 108.2 (4.4- > 999.9)* | 68.1 (4.9-946.5)* | 0 (<0.001-0.1) | 0.4 |
The horse does not move, or is reluctant to move when led | 12.2 | NE | NE | NE | ||
The horse is agitated, restless | 0.0 | NE | NE | NE | ||
Variable | Criteria | Specificity (%) 1 | Relevance (confidence interval) 2 | Item-total correlation 3 | ||
GA x GC | GAA X GC | GCA x GC | ||||
Response to palpation of the painful area (approximately 3 cm besides the wound) | No response or change in relation to pre-procedure palpation response of the surgical wound | 57.1 | 4.1 (1.1-15.)* | 18.8 (4.6-76.0)* | 0.3 (0.1-1.1)* | 0.4 |
Mild reaction to palpation of the surgical wound | 29.4 | 0.1 (0–0.5) | 0.1 (0–0.5) | 1.9 (0.6-5.9)* | ||
Violent reaction to palpation of the surgical wound | 13.4 | 2.1 (0.6-7.8)* | 0.1 (0–1.3)* | 1.7 (0.4-7.5)* | ||
Response to an auditory stimulus (clap hands) | Moves and/or pays attention with ears or head movements | 80.0 | 6.8 (0.5-84.0) | 4.9 (0.7-33.6) | 0.5 (0.1-2.0) | 0.3 |
Calm, no response | 18.6 | NE | NE | NE | ||
No response to auditory stimulus due to prostration | 0.0 | NE | NE | NE | ||
Looking at the flank | The horse does not look at the flank | 84.6 | 46.7 (9.9-219.0)* | 128.9 (21.2-782.7)* | 0.1 (0–0.3)* | 0.4 |
The horse looks at the flank | 15.4 | 0 (0–0.1) | 0 (0–0) | 11.7 (3.1-43.7)* | ||
Kicking at the abdomen | The horse does not kick the abdomen | 95.8 | NE | NE | NE | 0.3 |
The horse kicks at the abdomen | 2.5 | NE | NE | NE | ||
Lifting hind limbs | No lifting of hind limbs | 74.6 | 18.0 (3.9-81.9)* | 96.5 (16.4-566.4)* | 0.1 (0–0.4) | 0.6 |
Lifting hind limbs | 22.0 | 0.2 (0.1-0.8) | 0 (0–0.2) | 4.6 (1.3-16.1)* | ||
Lifting one of the hind limbs and extending the head | 3.4 | NE | NE | NE | ||
Head movement | Head straight ahead most of the time | 87.1 | 91.2 (10.1-822.7)* | 32.4 (6.7-155.7)* | 0.1 (0–0.3) | 0.4 |
Lateral and/or vertical occasional head movements | 12.1 | NE | NE | NE | ||
Lateral and/or vertical continuous head movements | 0.9 | NE | NE | NE | ||
Pawing on the floor (fore limbs) | Quietly standing, no pawing | 89.7 | 17.5 (3.6-84.9)* | 38.9 (6.6-230.1)* | 0.1 (0–0.5) | 0.4 |
Pawing | 9.4 | 0.1 (0–0.4) | 0 (0–0.2) | 4.1 (1.12-14.1)* | ||
Others | Moving the tail sharply and repeatedly | 21.7 | 0.9 (0.2-3.5) | 0.5 (0.1-2.1) | 1.8 (0.5-6.7) | 0.5 |
Moving the tail sharply and repeatedly and lifting the hind limbs | 9.2 | 0 (0–0.2) | 0 (0–0.2) | 2.4 (0.9-6.9) | ||
Partial penis protrusion | 23.2 | 2.3 (0.4-12.5) | 8.5 (1.6-4.2) | 0.4 (0–2.0) | 0.2 | |
Penis protrusion | 47.4 | NE | NE | NE | ||
GA x GC | GAA X GC | GCA x GC | ||||
Heart rate | - | - | - | - | 0.6 | |
Respiratory rate | - | - | - | - | 0.5 | |
Systolic blood pressure | - | - | - | - | 0.4 | |
Digestive sounds | - | - | - | - | 0.3 |