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Table 3 Cronbach’s alpha’s for measures to be used

From: A study protocol for a multicenter randomized pilot trial of a dyadic, tailored, web-based, psychosocial, and physical activity self-management program (TEMPO) for men with prostate cancer and their caregivers

Measures

Cronbach’s alphaa measure of reliability

Physical and emotional outcome measures

  Medical Outcome Survey (MOS) Short-Form (SF-12) [57]

 

    Physical Component Summary (PCS)

α = 0.82 [60]

    Mental Component Summary (MCS)

α = 0.75 [60]

  Hospital Anxiety and Depression Scale (HADS) [42]

α = 0.68–0.93 [62]

  Perceived Stress Scale (PSS) [68]

α = 0.75–0.89 [69]

Self-management outcome measures

  Health Education Impact Questionnaire (heiQ) [71]

 

    Constructive attitude and approaches

α = 0.81 [71]

    Skill and technique acquisition

α = 0.81 [71]

    Health Service navigation

α = 0.82 [71]

    Positive and active engagement in life

α = 0.86 [71]

    Health-directed activities

α = 0.80 [71]

    Self-monitoring and insight

α = 0.70 [71]

    Health-directed behaviors (caregivers only)

α = 0.80 [71]

    Emotional well-being (caregivers only)

α = 0.89 [71]

  Health Literacy Questionnaire (HLQ)

 

    Having sufficient information to manage my health

α = 0.89–0.94

    Actively managing my health

α = 0.76–0.88

PA & exercise outcome measures

  International Physical Activity Questionnaire [76]

ρ =0.80 [76]

  Physical Activity Plan and Intention

---

  Multidimensional Self-Efficacy for Exercise Scale (MSES) [78]

 

    Across dimensions of task, coping, and scheduling

α = 0.83–0.91 [78]

    Across time (baseline, 6-weeks, and 12-weeks)

α = > 0.78 [78]

Dyadic coping outcome measures

  Dyadic Coping Inventory (DCI) [79]

 

    Across both patients and partners

α = 0.63–0.84 [80]

  °Revised Dyadic Adjustment Scale (RDAS) [82]

α = 0.89–0.95 [83]

  1. a Cronbach’s alpha is interpreted as follows: Excellent (α ≥0.90), Good (α = ≥0.80-0.89), Acceptable (α = ≥0.70-0.79), and Poor (α = <0.70).
  2. ° Optional scale for both patients and caregivers to complete