Non-surgical Treatments for Urinary Incontinence in Adult Women: Diagnosis and Comparative Effectiveness
Modes of Results Reporting and Statistical Analysis in the CER (2 of 2)
Relative Risk (RR): The ratio of the rate (absolute risk, probability) of an event in the treatment group to the rate of the event in the comparison group.
For RR, the result is statistically significant at p < 0.05 when the 95 percent confidence interval does not include 1.0, which is the point of equal risk for both groups.
Absolute Risk Difference: The absolute value of the mathematical difference between the rates (risk) of an event in the treatment and comparison groups.
ARD = | ARC–ART |
Number of Attributable Events per 1,000: The number of reported events that can be attributed to the intervention of interest per 1,000 treated patients.
The attributable events value is calculated from the ARD.Number of attributable events per 1,000 = 1,000 x |ARC-ART|
- Higgins JPT, Green S, eds. Cochrane handbook for systematic reviews of interventions. Version 5.1.0. London: The Cochrane Collaboration; March 2011. Available at www.cochrane-handbook.org.
- Shamliyan T, Wyman J, Sainfort F, et al. Nonsurgical Treatments for Urinary Incontinence in Adult Women: Diagnosis and Comparative Effectiveness. Comparative Effectiveness Review No. 36 (Prepared by the Minnesota Evidence-based Practice Center under Contract No. 290-2007-10064-I). Rockville, MD: Agency for Healthcare Research and Quality; April 2012. AHRQ Publication No. 11(12)-EHC074-EF. Available at www.effectivehealthcare.ahrq.gov/ui.cfm.
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