Operated Male-to-Female Sexual Function Index: Validity of the First Questionnaire Developed to Assess Sexual Function after Male-to-Female Gender Affirming Surgery.

PURPOSE

No questionnaire is currently available to evaluate sexual function after male-to-female gender affirming surgery. Such a limit leads to a suboptimal evaluation in postoperative sexual function in these patients. We developed and validated a new questionnaire, the oMtFSFI (operated Male-to-Female Sexual Function Index), for assessing sexual function in male-to-female patients after surgery.

MATERIALS AND METHODS

A panel of experts in gender dysphoria defined the main content areas to be assessed, including genital self-image, desire, arousal, lubrication, orgasm, satisfaction and sexual pain. After a pretest on 10 patients the oMtFSFI was applied in the main study to 65 operated male-to-female patients, recruited at 7 Italian centers, and 57 women. The participants provided self-ratings on online oMtFSFI, Female Sexual Function Index, Beck Depression Inventory for Primary Care and Short Form Health Survey questionnaires. Operated male-to-female patients completed the oMtFSFI twice, 4 weeks apart.

RESULTS

Principal component analysis performed on self-ratings provided by operated male-to-female patients on oMtFSFI items yielded a 3-domain structure of sexual dissatisfaction, sexual pain and genital self-image. The 3 domains were internally consistent and test-retest reliable. Convergent associations with Female Sexual Function Index scales emerged for sexual dissatisfaction and sexual pain but not for genital self-image. Male-to-female patients reported lower sexual function levels than cisgender women.

CONCLUSIONS

The present preliminary results support reliability and psychometric validity of the oMtFSFI in the assessment of key sexual function domains in transgender women, further revealing that genital self-image represents an assessment area to be considered in male-to-female patients, in addition to domains that are salient for cis women as well.