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Table 2 Correlation of each item and total SC-NKSS scores

From: Translation and validation of the simplified Chinese new Knee Society Scoring System

  Mean ± SD Item-total correlation Cronbach’s alpha if item deleted
Syptom modified 6.75 ± 2.61 0.709 0.639
Satisfaction score 12.10 ± 4.42 0.820 0.504
Expectation score 10.85 ± 1.88 0.777 0.665
Functional activity score 40.95 ± 12.74 0.847 0.788