Web-based references relating to the number under the disk sign, listed by page header 
Epidemiology
1 Lancet 1996 348 1251
[Link]; page 642
2 Dr Peter Bribdle 2005 risk calculations--see NICE and SIGN guidelines and British study of over 12,000 people published in the November issue of the British Journal of General Practice
[Link]; page 642
Evidence-based medicine (EBM)
3 F Davidoff 1995 bmj i 1085 & W Rosenberg 1995 bmj i 1122 & ii 259
[Link]; page 644
4 Evidence-based Medicine bma, Journal marketing dept, po box 299, London wc1h 9jp-tel. 020 7383 6270. See L Ridsdale Evidence-based General Practice, isbn 0 7020 1611 " & A Miles 1995 Effective Clinical Practice, Blackwell 644
5 ASTIN: a Bayesian adaptive dose-response trial in acute stroke. Author: Grieve AP, Krams M. Journal: Clin Trials; 2005 ; 2(4):340-51; discussion 352-8, 364-78. PubMed ID: 16281432.
[Link]; page 644
6 F Davidoff 1995 bmj i 1085 & W Rosenberg 1995 bmj i 1122 & ii 259
[Link]; page 644
Six to five against
7 D Runyon `A Nice Price', in Runyon on Broadway, 1950, Constable
[Link]; page 646
Investigations change the odds
8 BMJ 2001;323:372 Is it possible to exclude a diagnosis of myocardial damage within six hours of admission to an emergency department? Diagnostic cohort study. K Herren
[Link]; page 648
10 C Hawke 1997 BMJ i 1690
[Link]; page 648
11 P Moayeddi 1997 bmj i 119
[Link]; page 648
11 Rees Rules were first formulated in The Times on June 9th 1988, page 15 650
12 E Black Diagnostic Strategies 2e 33 Am Col Physic
[Link]; page 648
Clin Biochem. 2003 Feb;36(1):27-30. Agewall S. Evaluation of point-of-care test systems using the new definition of myocardial infarction. English
[Link]; page 648
Number needed to treat (NNT)/Screening
13 No reference available page 650
14 Rees Rules were first formulated in The Times on June 9th 1988, page 15 650
15 Numbers needed to treat derived from meta-analyses--sometimes informative, usually misleading L Smeeth
[Link]; page 651
16 Confidence intervals for the number needed to treat DG Altman
[Link]; page 651
