Clinical evaluation of manual stress testing, stress ultrasound and 3D stress MRI in chronic mechanical ankle instability

Table 5 Correlation analysis reporting Spearman’s rho [95%-CI] between the different testing modalities

Parameter	CCAFT	CCATTH	CCATTV	Stress Sono	Physical examination
CAIT-Score	- 0.53** [−.27; −.68]	−.12 [−.32; .22]	0.34* [−.09; −.5]	ADT: −0.48 [−.2; −.72] TTT: −0.44 [−.19; −.69]	ADT: − 0.81 [−.63; −.88] TTT: − 0.83 [−.74; −.88]
FJS	−0.52** [−.27; −.73]	−.28 [−.49; .17]	−.15 [−.41; .27]	ADT: − 0.35* [.02; −.65] TTT: − 0.41** [−.12; −.69]	ADT: −0.75 [−.57; −.87] TTT: − 0.78 [−.65; −.87]
CCA_FT	–	0.31* [−.01; .58]	0.27* [−.15; .47]	ADT: −0.30* [−.05; .44] TTT: − 0.26* [−.03; .65]	ADT: 0.48 [.26; .7] TT: 0.53 [.27; .73]
CCA_TTH	–	–	n.s.	ADT: n.s. TTT: n.s.	ADT: .34* [−.1; .45] TTT: .36* [−.08; .48]
CCA_TTV	–	–	–	ADT: n.s. TTT: n.s.	ADT: n.s. TTT: n.s.
Stress sonography	–	–	–	–	ADT/ADT: .47 [.12; .65] TTT/TTT: 0.43 [.15; .67]

CAIT Cumberland Ankle Instability Tool, FJS Forgotten Joint Score, ADT anterior drawer test, TTT talar tilt test. 3SAM 3D stress ankle MRI
For stress sonography the difference load-rest in mm was used
For 3SAM-values the intraindividual relative reduction in cartilage contact area in % was used. CCA_FT Cartilage contact area fibulotalar, CCA_TTH Cartilage contact area tibiotalar horizontal, CCA_TTV Cartilage contact area tibiotalar vertical
Sign.: *p < 0.05, **p < 0.01, Spearman’s rho

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