Usefulness of the acromioclavicular joint cross-sectional area as a diagnostic image parameter of acromioclavicular osteoarthritis

Table 3 Sensitivity and specificity of each acromioclavicular joint space width cutoff point

ACJSW (mm)	Sensitivity (%)	Specificity (%)
1.41	8.6	100
1.86	34.3	100
2.04	54.3	100
2.37a	88.6	96.7
3.32	97.1	60.0
3.68	100	33.3

^aThe most suitable cutoff value in the receiver operating characteristic curve. ACJSW, acromioclavicular joint space width.