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HCPI

Helsinki Chronic Pain Index (HCPI)

Owner-completed 11-item chronic pain index for dogs, validated against orthopaedic gold standard.

Overview

Developer
Hielm-Björkman et al., University of Helsinki
Year published
2009
Species
Canine
Domain
Chronic pain (osteoarthritis)

Structure and administration

11 items, 5-point Likert (0-4), total range 0-44

Owner-completed, 3-5 minutes

Psychometric properties

Cronbach α
0.95
Test-retest ICC
0.89

Cut-off and interpretation

Cut-off threshold
12
Sensitivity
0.94
Specificity
0.98
AUC
0.95

Source: Della Rocca et al., Italian validation against orthopaedic gold standard, Front Vet Sci 2023.

Citation and validation

Hielm-Björkman AK, Rita H, Tulamo RM. Validation of the Helsinki Chronic Pain Index in dogs. Am J Vet Res 2009;70:727-734.

DOI: 10.2460/ajvr.70.6.727

Revisions

  • v1.0 (2009) — original Helsinki validation. The 11 items have not been changed.
  • Italian re-validation (Della Rocca et al., 2023) — confirmed the clinical-pain cut-off of 12 against orthopaedic gold standard with sensitivity 0.94 and specificity 0.98.

Target population

Adult dogs with chronic pain. Validated specifically in osteoarthritis-related pain; not validated in cats and not formally validated for non-orthopaedic chronic pain.

Available languages

English (UK)

Licence

Free for clinical and academic use with citation.

Scoring algorithm version

sightline-hcpi-v1.0.0

Strengths

  • Owner-completable in 3 to 5 minutes, which keeps fortnightly tracking realistic.
  • Excellent psychometric properties: Cronbach α 0.95, test-retest ICC 0.89.
  • Cut-off independently validated against orthopaedic gold standard with sensitivity 0.94 and specificity 0.98.
  • Free for clinical and academic use with citation, no per-deployment licence fee.

Limitations

  • Validated only in dogs and primarily for osteoarthritis-related chronic pain.
  • Single composite score, no subscale breakdown to localise the source of pain.
  • The vocalisation item runs in the opposite direction to the other items, owners can find this confusing on first read. Sightline addresses this with item-specific response labels.

Why Sightline uses it

HCPI is the most widely-validated owner-administered chronic pain instrument in dogs, with both an original validation and an independent re-validation that confirmed the published cut-off. Free deployment under citation keeps the methodology page accurate and the platform unencumbered by per-use licensing fees, and the 11-item structure is short enough that owners complete it consistently. For Sightline, consistent week-over-week completion matters more than depth of any single check-in.