What affects the placebo effect?

Beecher, 1955, The powerful placebo, J Am Med Assoc, 159, 1602, 10.1001/jama.1955.02960340022006 Hróbjartsson, 2010, Placebo interventions for all clinical conditions, Cochrane Database Syst Rev, CD003974 McDonald, 1983, How much of the placebo’ effect’ is really statistical regression?, Stat Med, 2, 417, 10.1002/sim.4780020401 Kaptchuk, 2015, Placebo effects in medicine, N Engl J Med, 373, 8, 10.1056/NEJMp1504023 Haylen, 2016, An International Urogynecological Association (IUGA)/International Continence Society (ICS) joint report on the terminology for female pelvic organ prolapse (POP), Int Urogynecol J, 27, 655, 10.1007/s00192-016-3003-y Phé, 2015, Outcome measures for stress urinary incontinence treatment: can we minimally agree?, World J Urol, 33, 1221, 10.1007/s00345-015-1524-5 Ghoniem, 2008, Evaluation and outcome measures in the treatment of female urinary stress incontinence: International Urogynecological Association (IUGA) guidelines for research and clinical practice, Int Urogynecol J Pelvic Floor Dysfunct, 19, 5, 10.1007/s00192-007-0495-5 Bright, 2014, Developing and validating the International Consultation on Incontinence Questionnaire bladder diary, Eur Urol, 66, 294, 10.1016/j.eururo.2014.02.057 Abrams, 2016, Electronic bladder diaries of differing duration versus a paper diary for data collection in overactive bladder, Neurourol Urodyn, 35, 743, 10.1002/nau.22800 Aitchison, 1989, Is the treatment of urgency incontinence a placebo response? Results of a five-year follow-up, Br J Urol, 64, 478, 10.1111/j.1464-410X.1989.tb05280.x Kelleher, 2018, Efficacy and tolerability of mirabegron compared with antimuscarinic monotherapy or combination therapies for overactive bladder: a systematic review and network meta-analysis, Eur Urol, 74, 324, 10.1016/j.eururo.2018.03.020 Rabin, 1993, Computerized voiding diary, Neurourol Urodyn, 12, 541, 10.1002/nau.1930120604 Nabi, 2006, Anticholinergic drugs versus placebo for overactive bladder syndrome in adults, Cochrane Database Syst Rev, CD003781 Nygaard, 2000, Reproducibility of the seven-day voiding diary in women with stress urinary incontinence, Int Urogynecol J Pelvic Floor Dysfunct, 11, 15, 10.1007/PL00004021 Lee, 2009, A meta-analysis of the placebo response in antimuscarinic drug trials for overactive bladder, BMC Med Res Methodol, 9, 55, 10.1186/1471-2288-9-55