Batailler et al reported the SKOOP score to evaluating a patient being considered for a high tibial osteotomy (HTO) for osteoarthritis. The authors are from multiple institutions in France.
SKOOP refers to the Sfa knee osteotomy predictive score. Sfa is an abbreviation for the French abbreviation of Francophone Arthroscopy Society.
Patient selection: high tibial osteotomy
Outcome: HTO survival (non-failure) vs failure over time, up to 14 years
Parameters:
(1) age in years
(2) body mass index (BMI) in kg per square meter
(3) articular narrowing
Parameter
Finding
Points
age in years
< 55 years
0
>= 55 years
1
BMI
< 25 kg per sq m
0
25 to 34 kg per square m
1
>= 35 kg per sq m
2
articular narrowing
incomplete
0
complete
1
total score =
= SUM(points for all of the parameters)
Interpretation:
• minimum score: 0
• maximum score: 4
• HTO survival was better if the score is < 3.
SKOOP Score
10-Year HTO "Survival"
0 to 2
82%
3 or 4
62%
A postoperative hip-knee-ankle (HKA) angle > 180° is an additional factor for HTO survival.
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