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. 2017 Sep 19;2017(9):CD004198. doi: 10.1002/14651858.CD004198.pub3

Summary of findings for the main comparison.

Silboesterol versus placebo

Silboesterol compared with placebo for stuttering priapism
Patient or population: men and boys with SCD and stuttering priapism
Settings: outpatients
Intervention: stilboestrol 5 mg
Comparison: placebo
Outcomes Illustrative comparative risks* (95% CI) Relative effect (95% CI) No. of Participants (studies) Quality of the evidence (GRADE) Comments
Assumed risk Corresponding risk
Placebo Stilboestrol 5 mg
Detumescence
Follow‐up: N/A
See comment See comment N/A N/A N/A This outcome was not measured.
Reduction in stuttering priapism
Follow‐up: 2 weeks
250 per 1000 730 per 1000 (183 to 1000) RR 2.92
(95% CI 0.73 to 11.70)
7 (1) ⊕⊝⊝⊝ very low1,2
Immediate side effects of treatment
Follow‐up: N/A
See comment See comment N/A N/A N/A This outcome was not measured.
Effect on later sexual function
Follow‐up: N/A
See comment See comment N/A N/A N/A This outcome was not measured.
Other untoward side effects of treatment
Follow‐up: N/A
See comment See comment N/A N/A N/A This outcome was not measured.
Efficacy of a prevention strategy
Follow‐up: N/A
See comment See comment N/A N/A N/A This outcome was not measured.
*The basis for the assumed risk (e.g. the median control group risk across trials) is provided in footnotes. The corresponding risk (and its 95% CI) is based on the assumed risk in the comparison group and the relative effect of the intervention (and its 95% CI). CI: confidence interval; N/A: not applicable; RR: risk ratio.
GRADE Working Group grades of evidence High quality: further research is very unlikely to change our confidence in the estimate of effect. Moderate quality: further research is likely to have an important impact on our confidence in the estimate of effect and may change the estimate. Low quality: further research is very likely to have an important impact on our confidence in the estimate of effect and is likely to change the estimate. Very low quality: we are very uncertain about the estimate.

1. Downgraded once due to unclear methods of randomisation and allocation. 2. Downgraded twice for imprecision: confidence intervals around the relative effect are very wide as the trial has a small number of participants and a low event rate.