“…The IIEF-15 was compared with a single-item self-assessment of ED, 19 the Patient Reported Outcomes Measurement Information System, 23 Quality Erection Questionnaire, 27 Erection Hardness Score, 20,24,27,33 Sexual Experience Questionnaire, 30 Male Genital Self-Image Scale, 39 Female Assessment of Male Erection, 38 partnership satisfaction, 43 Hypogonadism Impact of Symptoms Questionnaire Short Form, 25 Sexual Quality of LifeeMale , 29 Sexual Modes Questionnaire, 31 Inflammatory Bowel Disease Male Sexual Dysfunction Scale, 32 Beliefs About Sexual Functioning Scale, 34 Premature Ejaculation Tool, 41 and clinician ratings. 1,38,43 The methodologic quality was rated as "adequate" 1,23,27,29,31,32,34,38,39,41,43 or "doubtful". 19,20,24,25,33 The doubtful ratings were due to a small number ("other flaws" in COSMIN methodologic quality), 33 use of the Pearson correlation where the Spearman correlation should have been used, 24 imprecise reporting of hypotheses ("other flaws" in COSMIN methodologic quality), 25 the lack of information on measurement properties of the comparator instrument, 19 or imprecise reporting of results.…”