Monitoring equine head-related pain with the Equine Utrecht University scale for facial assessment of pain (EQUUS-FAP).
Abstract: This study validates a recently described pain scale, the Equine Utrecht University scale for facial assessment of pain (EQUUS-FAP), in horses with acute or postoperative pain originating from the head, including dental pain, ocular pain, or trauma to the skull. This cohort study of 23 horses with head-related pain and 23 normal, healthy controls revealed significant differences in EQUUS-FAP scores between control horses and horses with acute or postoperative pain (P <0.001). Moreover, pain scores after surgery decreased significantly over time (P <0.001). The scale showed good inter-observer reliability (intra-class correlation coefficient = 0.92), sensitivity (80%), specificity (78%), and positive (80%) and negative predictive values (78%).
Copyright © 2017 Elsevier Ltd. All rights reserved.
Publication Date: 2017-01-10 PubMed ID: 28190503DOI: 10.1016/j.tvjl.2017.01.006Google Scholar: Lookup
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- Journal Article
- Animal Health
- Animal Studies
- Clinical Findings
- Clinical Pathology
- Clinical Study
- Comparative Study
- Diagnosis
- Diagnostic Technique
- Disease Diagnosis
- Disease Treatment
- Equine Diseases
- Equine Health
- Horses
- In Vivo
- Observational Study
- Pain Management
- Post-Operative Period
- Surgery
- Veterinary Medicine
- Veterinary Procedure
- Veterinary Research
Summary
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The study investigates the effectiveness of the Equine Utrecht University scale for facial assessment of pain (EQUUS-FAP) in determining head-related pain in horses, showing its high reliability, sensitivity, and specificity.
Study Overview
- The research was conducted to validate the EQUUS-FAP, a pain scale specifically designed for assessing head-related pain in horses. It involved a sample of 23 horses suffering from acute or postoperative head-related pain, including conditions like dental pain, ocular pain or trauma to the skull.
- Another group of 23 healthy horses were used as control subjects for comparison. This two-group setup helped the researchers to accurately evaluate and compare the efficiency and consistency of the EQUUS-FAP scale.
Key Findings
- The EQUUS-FAP scores unveiled significant differences when comparing healthy control horses to those suffering from acute or postoperative head-related pain. This shows that the scale can effectively discern pain symptoms in horses.
- The study also demonstrated that the scores from the EQUUS-FAP pain scale decreased significantly over time after surgery, indicating the scale’s potential to track the progress of recovery from postoperative pain.
Scale Reliability and Effectiveness
- The inter-observer reliability of the EQUUS-FAP pain scale was found to be excellent, with the intra-class correlation coefficient measuring at 0.92. This indicates that there’s a high degree of agreement in the scale’s scoring when used by different observers, suggesting it can be a reliable tool for objectively assessing equine pain.
- The study reported sensitivity (80%) and specificity (78%) of EQUUS-FAP. High sensitivity confirms that the scale is good at identifying true positives — horses that are in pain, while high specificity shows it is good at identifying true negatives — horses that are not suffering from pain.
- Positive and negative predictive values were both reported at 78%, indicating that the scale is similarly accurate in predicting the presence and absence of pain.
With these results, the researchers concluded that the EQUUS-FAP is an effective and reliable tool for assessing and monitoring head-related pain in horses. This can aid in more appropriate and timed interventions, promoting animal welfare.
Cite This Article
APA
van Loon JP, Van Dierendonck MC.
(2017).
Monitoring equine head-related pain with the Equine Utrecht University scale for facial assessment of pain (EQUUS-FAP).
Vet J, 220, 88-90.
https://doi.org/10.1016/j.tvjl.2017.01.006 Publication
Researcher Affiliations
- Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 114, NL-3584 CM Utrecht, The Netherlands. Electronic address: j.p.a.m.vanloon@uu.nl.
- Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 114, NL-3584 CM Utrecht, The Netherlands; Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; Department of Veterinary Sciences Antwerp University, Universiteitsplein 1, 2610 Wilrijk - Antwerp, Belgium.
MeSH Terms
- Acute Pain / diagnosis
- Acute Pain / etiology
- Acute Pain / veterinary
- Animals
- Cohort Studies
- Face / physiopathology
- Female
- Head / physiopathology
- Horse Diseases / diagnosis
- Horse Diseases / etiology
- Horses
- Male
- Observer Variation
- Pain Measurement / methods
- Pain Measurement / veterinary
- Pain, Postoperative / diagnosis
- Pain, Postoperative / etiology
- Pain, Postoperative / veterinary
- Reproducibility of Results
- Sensitivity and Specificity
Citations
This article has been cited 15 times.- Ask K, Andersen PH, Tamminen LM, Rhodin M, Hernlund E. Performance of four equine pain scales and their association to movement asymmetry in horses with induced orthopedic pain. Front Vet Sci 2022;9:938022.
- Emanuel D, Kästner SBR, Delarocque J, Grob AJ, Bienert-Zeit A. Influence of Butorphanol, Buprenorphine and Levomethadone on Sedation Quality and Postoperative Analgesia in Horses Undergoing Cheek Tooth Extraction. Vet Sci 2022 Apr 6;9(4).
- Lanci A, Benedetti B, Freccero F, Castagnetti C, Mariella J, van Loon JPAM, Padalino B. Development of a Composite Pain Scale in Foals: A Pilot Study. Animals (Basel) 2022 Feb 11;12(4).
- Haunhorst FR, Hopster K, Schmicke M, Bienert-Zeit A, Kästner S. Clinical effect of buprenorphine or butorphanol, in combination with detomidine and diazepam, on sedation and postoperative pain after cheek tooth extraction in horses. Can Vet J 2022 Jan;63(1):39-46.
- Andersen PH, Broomé S, Rashid M, Lundblad J, Ask K, Li Z, Hernlund E, Rhodin M, Kjellström H. Towards Machine Recognition of Facial Expressions of Pain in Horses. Animals (Basel) 2021 Jun 1;11(6).
- Torcivia C, McDonnell S. Equine Discomfort Ethogram. Animals (Basel) 2021 Feb 23;11(2).
- Cohen S, Beths T. Grimace Scores: Tools to Support the Identification of Pain in Mammals Used in Research. Animals (Basel) 2020 Sep 23;10(10).
- van Loon J, Verhaar N, van den Berg E, Ross S, de Grauw J. Objective Assessment of Acute Pain in Foals Using a Facial Expression-Based Pain Scale. Animals (Basel) 2020 Sep 10;10(9).
- van Dierendonck MC, Burden FA, Rickards K, van Loon JPAM. Monitoring Acute Pain in Donkeys with the Equine Utrecht University Scale for Donkeys Composite Pain Assessment (EQUUS-DONKEY-COMPASS) and the Equine Utrecht University Scale for Donkey Facial Assessment of Pain (EQUUS-DONKEY-FAP). Animals (Basel) 2020 Feb 22;10(2).
- Maldonado Moreno N, Alves Moreira J, Araujo De Oliveira L, Sanches Gontijo A, Castilho Baldi ML, Rocha Wenceslau R, Beier SL. Analgesic and Gastrointestinal Effects of Methadone in Horses Undergoing Orchiectomy. Animals (Basel) 2025 Aug 11;15(16).
- Vitale V, Velloso Álvarez A, de la Cuesta-Torrado M, Neira-Egea P, Vandecandelaere M, Tee E, Gimeno M, van Galen G. Can Acute Neurological Disease Cause Cardiomyopathy in Horses?. Animals (Basel) 2025 May 16;15(10).
- Sidwell AE, Duz M, Hill B, Freeman S, Hole SL. Application of the horse grimace scale in horses with dental disease: Preliminary findings. Vet Rec 2025 Feb 1;196(3):e4800.
- Howard DL, Lancaster B, de Grauw J. Development and Preliminary Validation of an Equine Brief Pain Inventory for Owner Assessment of Chronic Pain Due to Osteoarthritis in Horses. Animals (Basel) 2024 Jan 5;14(2).
- Ask K, Rhodin M, Rashid-Engström M, Hernlund E, Andersen PH. Changes in the equine facial repertoire during different orthopedic pain intensities. Sci Rep 2024 Jan 2;14(1):129.
- Jodzio D, DeNotta S, Plummer C, Sanchez C. Pain scoring systems in hospitalized horses with ocular disease. J Vet Intern Med 2024 Jan-Feb;38(1):388-397.
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