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Updated: May 24, 2026

Determining the Contribution of the Energy Systems During Exercise
Published on: March 20, 2012
Validation of the Energy Conservation Strategies Inventory (ECSI)
Young Ho Yun1, Soo Hyun Kim, A Jin Yang
1Cancer Management Branch, Research Institute, National Cancer Center, Goyang, Gyeonggi, Republic of Korea. lawyun08@gmail.com
Context:
In applying good energy conservation strategies to relieve cancer-related fatigue, it is critical to first identify cancer patients who are at a high risk for poor energy conservation. However, instruments have not been developed to evaluate energy conservation strategies in an oncology setting.
Objectives:
The aim of this study was to validate an instrument that cancer patients may use to evaluate energy conservation strategies to overcome cancer-related fatigue.
Methods:
The questionnaire development followed a four-phase process: 1) item generation and reduction, 2) construction, 3) pilot testing, and 4) field testing. Using relevant and priority criteria, as well as pilot testing, we developed a 25-item questionnaire. After field testing, five items were discarded. Finally, 20 items were included in the Energy Conservation Strategies Inventory (ECSI). Factor analysis, multitrait scaling analysis, and Cronbach's α were used to determine the construct validity and reliability.
Results:
Factor analyses of data from 140 cancer patients resulted in the ECSI, which covers activities related to planning, overcoming distractions, labor saving, burden reducing, and comfort. All subscales (Cronbach's α range, 0.69-0.78) and total scores (Cronbach's α=0.87) were found to possess acceptable internal consistency.
Conclusions:
The good psychometric properties of the ECSI instrument show that it may be useful for measuring the frequency of energy conservation strategies used by cancer patients.
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