RESUMO
BACKGROUND: Sexual changes in breast cancer occur after diagnosis and treatment, including a mastectomy. Sexual assertiveness is an effective factor in sexual satisfaction, which means the ability to convey sexual feelings, beliefs, and thoughts. Given the limited studies on sexual assertiveness in breast cancer and different client participation, this study was conducted to compare the effect of sexual counseling based on two models of PLISSIT (Permission, Limited Information, Specific Suggestion, Intensive Therapy) and BETTER (Bring Up, Explain, Tell, Time, Education, Record) on sexual assertiveness in women after mastectomy. MATERIALS AND METHODS: This quasi-experimental intervention was conducted in 2021 in Mashhad, Iran. Seventy-eight mastectomized women with breast cancer were assigned to the BETTER (n = 39) and PLISSIT (n = 39) groups using permuted block randomization with a block size of 4 and an allocation ratio of 1:1. Both groups received four individual counseling sessions, one week apart. The research tools included a demographic information form and the Hulbert index of sexual assertiveness. Changes in the mean scores of sexual assertiveness between the two groups were evaluated before and four weeks after the intervention, and the mean changes were compared between the groups. Data analysis was conducted using the Kolmogorov-Smirnov test, independent t-test, paired t-test, and Chi-square tests using Statistical Package for the Social Sciences (SPSS) version 25 (P < 0.05). RESULTS: The results of the study showed that before the intervention, there was no significant difference in the score of sexual assertiveness in both groups (P = 0.253). The mean score of sexual assertiveness changes before and after the intervention in the BETTER group (8.07 ± 4.9) was significantly higher than in the PLISSIT group (5.58 ± 4.7) (P < 0.001). CONCLUSION: The results indicated that BETTER sexual counseling was more effective in increasing the sexual assertiveness of mastectomized women than PLISSIT counseling. Due to its simplicity and client-centeredness, this model can be used in breast cancer care programs.