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Table 2 Subscale analysis of RT Information Needs Scale

From: Validity and reliability testing of two instruments to measure breast cancer patients' concerns and information needs relating to radiation therapy

Subscales and items Cronbach's Alpha Inter-Item Correlation Item-to-Total Correlations
Initial information about radiation therapy
Q1 Why I need to receive radiation therapy
Q2 What radiation therapy will involve
Q7 The radiation oncologist who is treating me
0.75 All item correlations between 0.57 and 0.73 All items between 0.60 and 0.70.
Information relating to planning treatment
Q4 What happens during the planning appointment
Q6 How my treatment is planned
Q9 How much of my breast will be treated
Q11 What happens on the first day
0.76 10/12 items between 0.3 and 0.70 All items between 0.45 and 0.74.
Information relating to first day of treatment
Q8 The roles of different staff in the department
Q10 The treatment machine
Q12 Why there are cameras and computers in the treatment room and what they are used for
Q13 What the x-rays that are taken on the treatment machine are used for
Q20 Who can provide me with information
Q14 What side effects I may experience
Q15 Whether the radiation will effect my heart
Q16 Whether my lungs will be damaged by treatment
Q17 Other people's experiences of receiving treatment
Q18 How to take care of my skin
0.79 42/72 (58%) item correlations between 0.30 and 0.70. All items between 0.30 and 0.70.
Effect treatment will have on day to day living during treatment
Q19 Whether I can keep working during treatment
Q21 What will happen after treatment is finished
Q22 The cost of treatment
Q23 Transport that is available
Q24 Parking
0.73 9/12 (75%) item correlations between 0.30 and 0.70. All items between 0.40 and 0.70.