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Table 2 Zero correlation between variables

From: Investigating psychometric properties of the Thai version of the Zarit Burden Interview using rasch model and confirmatory factor analysis

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1. ZBI-1210.855**0.281**0.0010.1530.377**0.466**− 0.366**0.540**0.452**
2. ZBI-22 10.289**0.0360.1200.364**0.418**− 0.356**0.510**0.366**
3. EQ-5D: mobility  10.341**0.481**0.451**0.240*− 0.738**0.356**0.122
4. EQ-5D: self-care   10.534**0.1270.118− 0.644**0.273**0.109
5. EQ-5D: usual activities    10.291**0.380**− 0.778**0.473**0.223*
6. EQ-5D: pain/discomfort     10.488**− 0.623**0.426**0.166
7. EQ-5D: anxiety/depression      1− 0.617**0.590**0.379**
8. EQ-5D Utility index       1− 0.623**− 0.298**
9. PHQ-9        10.392**
10. PSS         1
  1. ZBI, Zarit Burden Interview; PHQ-9, Patient Health Questionnaire-9; PSS, Perceived stress scale
  2. *p < 0.05, **p < 0.01