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. Author manuscript; available in PMC: 2019 May 1.
Published in final edited form as: J Cardiovasc Nurs. 2018 May-Jun;33(3):217–224. doi: 10.1097/JCN.0000000000000447

Figure 1. Moderation Testing Analysis Plan.

Figure 1

The analytic approach involves using hierarchical regression to examine whether the interaction of symptoms (physical and depressive) and self-care behaviors significantly influence HRQOL (emotional and physical) above and beyond the independent contributions of symptoms and self-care. Emotional HRQOL was regressed on physical symptoms, each self-care behavior (maintenance and management) and an interaction term combining physical symptoms and a self-care behavior. The same approach was used examine the influence of depression and self-care behaviors on physical HRQOL. The reason a metric of emotional HRQOL was analyzed in relation to physical symptoms and physical HRQOL in relation to emotional symptoms was to avoid inherent measurement overlap.

Abbreviations: HRQOL – health-related quality of life