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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.