Implementing GRADE: Calculating the risk difference from the baseline risk and the relative risk

Evidence-Based Medicine

Volumn 19, Issue 1, 2014, Pages 6-8

  Newcombe, Robert G ^a   Bender, Ralf ^b  

^a CARDIFF UNIVERSITY   (United Kingdom)

^b INSTITUTE FOR QUALITY AND EFFICIENCY IN HEALTH CARE IQWIG   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

ANALGESIC AGENT; BUPIVACAINE; LOW MOLECULAR WEIGHT HEPARIN;

ARTICLE; ATTRIBUTABLE RISK; CESAREAN SECTION; CONFIDENCE INTERVAL; EVIDENCE BASED PRACTICE; GRADING OF RECOMMENDATIONS ASSESSMENT DEVELOPMENT AND EVALUATION SYSTEM; HUMAN; LOW DRUG DOSE; META ANALYSIS (TOPIC); NAMED INVENTORIES, QUESTIONNAIRES AND RATING SCALES; RISK FACTOR; RISK REDUCTION; SPINAL ANESTHESIA; UNCERTAINTY; VENOUS THROMBOEMBOLISM;

EPIDEMIOLOGY; STATISTICS & RESEARCH METHODS;

DATA INTERPRETATION, STATISTICAL; EVIDENCE-BASED MEDICINE; HUMANS; RISK; RISK ASSESSMENT; TREATMENT OUTCOME;

EID: 84895530589     PISSN: 13565524     EISSN: 14736810     Source Type: Journal    
DOI: 10.1136/eb-2013-101340     Document Type: Article

References (17)

1. Guyatt GH, Oxman AD, Schünemann HJ, et al. GRADE guidelines: a new series of articles in the Journal of Clinical Epidemiology. J Clin Epidemiol 2011;64: 380-2.
2. Spencer FA, Iorio A, You J, et al. Uncertainties in baseline risk estimates and confidence in treatment effects. Br Med J 2012;345:e7401.
3. Deeks JJ. Issues in selection of a summary statistic for meta-analysis of clinical trials with binary outcomes. Stat Med 2002;21: 1575-600.
4. Gardner MJ, Altman DG. Confidence intervals rather than P values: estimating rather than hypothesis testing. Br Med J 1986;292: 746-50.
5. Rothman KJ, Greenland S. Modern epidemiology. 2nd edn. Philadelphia: Lippincott-Raven, 1998.
6. Zou GY, Donner A. Construction of confidence limits about effect measures: a general approach. Stat Med 2008;27: 1693-702.
7. Donner A, Zou GY. Closed-form confidence intervals for functions of the normal mean and standard deviation. Stat Methods Med Res 2012;21: 347-59.
8. Newcombe RG. MOVER-R confidence intervals for ratios and products of two independently estimated quantities. Stat Methods Med Res 2013. In press.
9. Bates SM, Greer IA, Veenstra D, et al. Venous thromboembolism, thrombophilia, antithrombotic therapy, and pregnancy. ACCP Evidence-based Clinical Practice Guidelines, 9th Edition. Chest 2012;141(2-Suppl):e691S-736S.
10. Wilson EB. Probable inference, the law of succession, and statistical inference. J Am Stat Assoc 1927;22: 209-12.
11. Mara M, Koryntova D, Rezabek K, et al. [Thromboembolic complications in patients undergoing in vitro fertilization: retrospective clinical study.] Ceska Gynekol 2004;69: 312-16.
12. Arzola C, Wieczorek PM. Efficacy of low-dose bupivacaine in spinal anaesthesia for caesarean delivery: systematic review and meta-analysis. Br J Anaesth 2011;107: 308-18.
13. Garry M, Davies S. Failure of regional blockade for caesarean section. Int J Obstet Anaesth 2002;11: 9-12.
14. Rascol O, Brooks D, Korczyn AD, et al. A five year study of the incidence of dyskinesia in patients with early Parkinson's disease who were treated with ropinirole or levodopa. N Engl J Med 2000;342: 1484-91.
15. Miettinen O, Nurminen M. Comparative analysis of two rates. Stat Med 1985;4: 213-26.
16. Newcombe RG. Interval estimation for the difference between independent proportions: comparison of eleven methods. Stat Med 1998;17: 873-90.
17. Schünemann HJ, Oxman AD, Higgins JPT, et al. Chapter 11: presenting results and 'summary of findings' tables. In: Higgins JPT, Green S, eds. Cochrane handbook for systematic reviews of interventions version 5.1.0 (updated March 2011). The Cochrane Collaboration, 2011. http://www.cochrane-handbook.org