Research Methods in Health: Investigating Health and Health Services

By Ann Bowling | Go to book overview

9

Quantitative research:
experiments and other analytic
methods of investigation
Introduction216
The experimental method216
Internal and external validity219
Reducing bias in participants and the investigating team223
Blind experiments224
The randomised controlled trial in health care evaluation225
Other analytic methods of investigation228
Before-after study with non-randomised control group231
After-only study with non-randomised control group231
Time series studies using different samples (historical controls)232
Geographical comparisons232
People acting as own controls233
Within-person, controlled site study233
Threats to the validity of causal inferences in other analytic studies233
Summary of main points234
Key questions235
Key terms235
Recommended reading236

-215-

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