Why evidence-based research?

In 1996, David Sackett and colleagues wrote a short editorial in the BMJ that has anchored the field ever since. Their point was simple: evidence-based practice means integrating the best available external evidence with your own expertise and the specific question in front of you. Not one of these things alone — all three, together.

That definition matters because of what it rules out. Evidence-based work is not:

• Cookbook research. Blindly following a protocol or a textbook without judgement is not evidence-based practice; Sackett and colleagues were explicit that external evidence can inform, but never replace, individual expertise and context.
• Evidence worship. A study result from a different population, setting, or question may simply not apply to yours. Deciding whether it applies is itself an act of expertise.

Why this matters for your first project

As a student or early-career researcher, you will constantly be pulled toward two failure modes: doing what your supervisor's lab has always done (authority-based research), or grabbing whatever paper you find first (convenience-based research). The evidence-based habit is a third way: ask what the best available evidence says, weigh how good that evidence actually is, and apply it with judgement to your own setting.

Everything in this course builds on that habit:

1. Module 1 teaches you to ask questions precise enough to be answered.
2. Module 2 teaches you what different study designs can and cannot claim, and how bias creeps in.
3. Module 3 teaches you to appraise papers against the same checklists journals and reviewers use.
4. Module 4 teaches you to do and publish research with integrity — including the specific realities of publishing from Africa.

Good researchers are not people who know all the answers. They are people who know how to find, judge, and honestly use the best available evidence.

Sources

• Sackett DL, Rosenberg WM, Gray JA, Haynes RB, Richardson WS (1996). Evidence based medicine: what it is and what it isn't. BMJ 312(7023):71–72. doi:10.1136/bmj.312.7023.71 (PMID 8555924)