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Measuring reliability and validity of a newly developed stress instrument: Newly Diagnosed Breast Cancer Stress Scale

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  • Tso‐Ying Lee
  • Hsing‐Hsia Chen
  • Mei‐Ling Yeh
  • Hui‐Ling Li
  • Kuei‐Ru Chou

Abstract

Aims and objectives To assess the reliability and validity of a developed instrument entitled Newly Diagnosed Breast Cancer Stress Scale. Background Distress, clinical anxiety and depression are evident in patients with cancer, leading to poor psychosocial and quality‐of‐life outcomes. Design Instrument development study with norm‐referenced measurements. Methods Content validity was determined by expert review. Cronbach's α was used to assess internal consistency reliability and product‐moment correlations were conducted. Exploratory factor analysis measured validity of items using varimax rotation method. Criterion‐related validity testing used the Perceived Stress Scale and the convergent validity test of construct validity used the Hospital Anxiety and Depression Scale. A total of 125 women pathologically diagnosed with breast cancer were interviewed on the day prior to initial breast surgery. Results After testing, the Newly Diagnosed Breast Cancer Stress Scale consisted of four main factors with 17 items with acceptable reliability and good validity, and its length and time to complete the questionnaire were appropriate. Internal consistency reliability of the scale was shown by Cronbach's α = 0·84, the criterion validity of Perceived Stress Scale‐10 was r = 0·46 (p

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  • Tso‐Ying Lee & Hsing‐Hsia Chen & Mei‐Ling Yeh & Hui‐Ling Li & Kuei‐Ru Chou, 2013. "Measuring reliability and validity of a newly developed stress instrument: Newly Diagnosed Breast Cancer Stress Scale," Journal of Clinical Nursing, John Wiley & Sons, vol. 22(17-18), pages 2417-2425, September.
    • Handle: RePEc:wly:jocnur:v:22:y:2013:i:17-18:p:2417-2425
    DOI: 10.1111/jocn.12107
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    1. Tso-Ying Lee & Shih-Chun Hsing & Chin-Ching Li, 2021. "An Improved Stress-Scale Specifically Designed to Measure Stress of Women with Newly Diagnosed Breast Cancer," IJERPH, MDPI, vol. 18(5), pages 1-12, February.

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