QLU-C10D and EQ-5D-3L: Grammar Correction and Equivalence

This article highlights a common grammatical error in the sentence "QLU-C10D and EQ-5D-3L were equivalence" and explains why the verb "were" should be replaced with "is" to ensure proper subject-verb agreement. The corrected sentence is: "QLU-C10D and EQ-5D-3L is equivalence." This clarifies the relationship between the two instruments and the concept of equivalence.