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. 2023 Dec 7;32(1):14.
doi: 10.1007/s00520-023-08231-2.

A head-to-head comparison of the measurement properties of EQ-5D-3L and EQ-5D-5L in Chinese family caregivers of cancer patients

Huan Zhang #  1 , Bo Liu #  2 , Wen Gu #  2 , Yiyin Cao  2 , Juan Xu  2 , Rachel Lee-Yin Tan  3 , Enxue Chang  2 , Wanji Zheng  2 , Haofei Li  2 , Lan Zhou  2 , Yanni Jia  2 , Hongbin Yang  4 , Sheng Guo  5 , Weidong Huang  6 , Nan Luo  3
Affiliations

A head-to-head comparison of the measurement properties of EQ-5D-3L and EQ-5D-5L in Chinese family caregivers of cancer patients

Huan Zhang et al. Support Care Cancer. .

Abstract

Background: Although both EQ-5D-3L(3L) and EQ-5D-5L(5L) have demonstrated good measurement properties in several patient populations, there is currently limited evidence comparing the measurement properties of 3L and 5L in family caregivers (FCs) of cancer patients.

Purpose: This study aimed to compare the measurement properties of 3L and 5L in a sample of family caregivers of cancer patients.

Methods: A consecutive sample of FCs of cancer patients recruited from three tertiary hospitals were invited to complete the two versions of the EQ-5D in two rounds of interviews. We compared i) the ceiling effect using the McNemar's test, ii) test-retest reliability using intraclass correlation coefficient (ICC) and Cohen's Kappa, iii) convergent validity using Spearman's rank correlation coefficient, iv) known-group validity using F-statistic, v) and discriminant capacity using ordinal logistic regression.

Results: A total of 416 FCs completed the baseline questionnaire and 120 caregivers completed the follow-up questionnaire. Ceiling effects were smaller in 5L (12.5%) than in 3L (20.7%). The convergent validity (r = 0.344-0.771), known-groups validity (Fratio5L/3L = 2.06-4.09), discriminant capacity (ES = 0.341-0.396), and test-retest reliability (ICC = 0.725) of the 5L were slightly better than those of the 3L in China.

Conclusion: The current study found both 3L and 5L to be suitable for use by FCs of cancer patients. However, 5L showed superior measurement properties compared to 3L and therefore could be the preferred instrument when EQ-5D data of cancer patients FCs is required.

Keywords: Cancer; EQ-5D-3L; EQ-5D-5L; Family caregiver; Measurement property.

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