This 1995 paper by Diméglio et al. prospectively developed and validated a 20-point clinical classification system for idiopathic clubfoot severity. The system scores four reducibility parameters plus four pejorative features, stratifying feet into four grades to standardize treatment planning and outcome comparison. It was developed across 171 feet at two French centers and is now the dominant classification system used in clubfoot research worldwide.
Every clubfoot series you read in the literature is only meaningful if the authors stratified by Diméglio grade. Without this, a high success rate may simply reflect a cohort loaded with Grade I feet that were always going to do well.
When you see a newborn with clubfoot, score it using all four reducibility parameters plus the pejorative features before starting any treatment. A Grade I foot (score <5, >90% reducible) should be managed conservatively with serial casting — Ponseti technique. And documented separately from Grade III–IV feet in any outcome tracking.
For Grade III–IV feet, this classification is why we tailor the surgical release: a stiff-stiff Grade IV foot needs extensive posteromesiolateral release, while a lower-grade foot corrected partially by casting may need only a limited posterior release.
One nuance worth knowing: radiographic assessment is unreliable in the first 3 months of life because ossification is insufficient. The Diméglio system is intentionally clinical, making it applicable from birth.
This 1995 paper by Diméglio et al. prospectively developed and validated a 20-point clinical classification system for idiopathic clubfoot severity. The system scores four reducibility parameters plus four pejorative features, stratifying feet into four grades to standardize treatment planning and outcome comparison. It was developed across 171 feet at two French centers and is now the dominant classification system used in clubfoot research worldwide.
Every clubfoot series you read in the literature is only meaningful if the authors stratified by Diméglio grade. Without this, a high success rate may simply reflect a cohort loaded with Grade I feet that were always going to do well.
When you see a newborn with clubfoot, score it using all four reducibility parameters plus the pejorative features before starting any treatment. A Grade I foot (score <5, >90% reducible) should be managed conservatively with serial casting — Ponseti technique. And documented separately from Grade III–IV feet in any outcome tracking.
For Grade III–IV feet, this classification is why we tailor the surgical release: a stiff-stiff Grade IV foot needs extensive posteromesiolateral release, while a lower-grade foot corrected partially by casting may need only a limited posterior release.
One nuance worth knowing: radiographic assessment is unreliable in the first 3 months of life because ossification is insufficient. The Diméglio system is intentionally clinical, making it applicable from birth.