Investigating the Pathophysiological Nature of Homosexuality

Change of Symptom Checklist-90-Revised (SCL-90-R) from baseline to 34 weeks

The SCL-90-R Is an inventory developed to assess the intensity of symptoms inventoried during the last weeks. Each of the 90 items that is integrated in the self-report questionnaire is answered in a likert scale from 0 (nothing) to 4 (a lot), depending on the intensity with which the subject has lived in the last weeks the discomfort that each one explores. It is evaluated and interpreted in function of 10 primary dimensions (somatization, obsession-compulsion, interpersonal sensitivity, depression, anxiety, hostility, phobic anxiety, paranoid ideation, psychotic and diverse symptoms and three global indexes of psychological disorders.

Change of Sexual Compulsivity Scale (SCS) from baseline to 34 weeks

The SCS contains 10 items (e.g., "my desires to have sex have disrupted my daily life"), rated from 1 (not at all like me) to 4 (very much like me). Item responses are summed to derive an overall score (range 10-40). A score of 24 or higher is frequently used to distinguish problematic sexual compulsivity

Change of Safer Sex Self-Efficacy Questionnaire (SSSE) from baseline to 34 weeks

The 13-item SSSE assesses self-efficacy for condom use in various situations (e.g., "When you really need affection," "When your partner says he/she does not want to use a condom") in response to the prompt, "How confident are you that you could avoid having anal sex without a condom?" using a scale ranging from 1 (not at all tempted) to 5 (extremely tempted). The SSSE predicts condomless anal intercourse among men who have sex with men (MSM; Rendina, 2014).

Change of Measure of Gay-Related Stress (MOGS) from baseline to 34 weeks

The MOGS contains 56 stressors related to being gay, which participants rated in terms of the negative and positive impact each stressor had if it occurred in the past 12 months along a scale ranging from -3 (extremely negative) to 3 (extremely positive).

Change of Internalized Homophobia Scale (IHP) from baseline to 34 weeks

The IHP assesses how troubled gay and bisexual men are about their sexual identities over the past year. Participants rate nine items using a scale from 1 (never) to 4 (often). The IHP is associated with general mental and sexual health problems in a sample of adult gay men (Meyer, 1995).

Change of Sexual Orientation Concealment Scale (SOCS) from baseline to 34 weeks

In the SOCS, participants indicate the degree to which they are "out of the closet" to five domains of people: family; gay, lesbian, and bisexual friends; straight friends; co-workers; and health care providers, using a scale from 1 (out to all) to 4 (out to none).