Articles by Professor Trisha Greenhalgh of University College London.

The Medline database.
BMJ. 1997 Jul 19;315(7101):180-3.

Getting your bearings (deciding what the paper is about).
BMJ. 1997 Jul 26;315(7102):243-6.

Assessing the methodological quality of published papers.
BMJ. 1997 Aug 2;315(7103):305-8.

Statistics for the non-statistician. I: Different types of data need different statistical tests.
BMJ. 1997 Aug 9;315(7104):364-6.
Erratum in: BMJ 1997 Sep 13;315(7109):675.

Statistics for the non-statistician. II: "Significant" relations and their pitfalls.
BMJ. 1997 Aug 16;315(7105):422-5.

Papers that report drug trials.
BMJ. 1997 Aug 23;315(7106):480-3.

Papers that report diagnostic or screening tests.
BMJ. 1997 Aug 30;315(7107):540-3.
Erratum in: BMJ 1997 Oct 11;315(7113):942.
Erratum in: BMJ 1998 Jan 17;316(7126):225.

Papers that tell you what things cost (economic analyses).
BMJ. 1997 Sep 6;315(7108):596-9.

Papers that summarise other papers (systematic reviews and meta-analyses).
BMJ. 1997 Sep 13;315(7109):672-5.

Papers that go beyond numbers (qualitative research).
BMJ. 1997 Sep 20;315(7110):740-3.