Results of reliability and validity analysis for the PSA questionnaire among BC women with AET
| Factor | Item | Factor loading | Eigenvalue | Explanatory variation (%) | Cumulative explanatory variation (%) | Cronbach’s alpha coefficient | Correlation coefficient |
| 1 | Q1. I am worried about metastasis or recurrence | 0.845 | 5.920 | 36.997 | 36.997 | 0.899 | 0.857* |
| Q2. Breast problems make me feel nervous | 0.802 | ||||||
| Q3. I am worried that breast disease will get worse | 0.800 | ||||||
| Q4. Breast problems make me feel scared | 0.795 | ||||||
| Q5. I am worried about the side effects of the drug | 0.705 | ||||||
| Q6. Breast problems make me very depressed | 0.670 | ||||||
| 2 | #Q7. I still think of myself as an attractive person | 0.784 | 1.954 | 12.211 | 49.208 | 0.790 | 0.685* |
| #Q8. Overall, I am satisfied with myself | 0.761 | ||||||
| #Q9. I think I am still a valuable person | 0.738 | ||||||
| #Q10. I can share happiness and sadness with friends and colleagues | 0.660 | ||||||
| #Q11. I am still interested in things I was interested in before | 0.649 | ||||||
| 3 | Q12. Breast problems affect my sex life | 0.795 | 1.468 | 9.174 | 58.382 | 0.664 | 0.698* |
| Q13. I can not face the weight gain | 0.681 | ||||||
| Q14. Disease affects my appearance and makes me unhappy | 0.638 | ||||||
| 4 | Q15. I am not willing to discuss breast problems with others | 0.861 | 1.068 | 6.675 | 65.057 | 0.730 | 0.573* |
| Q16. I do not like others asking about my condition | 0.839 |
Confirmatory factor analysis.
*At level 0.01 (double tail), the correlation is significant. # is the reverse scoring item.
AET, adjuvant endocrine therapy; BC, breast cancer; PSA, psychosocial adaptation.