This guide, aimed at health students, provides basic level support for appraising quantitative research papers. It's designed for students who have already attended lectures on critical appraisal. One framework for appraising quantitative research (based on reliability, internal and external validity) is provided and there is an opportunity to practise the technique on a sample article.
Please note this framework is for appraising one particular type of quantitative research a Randomised Controlled Trial (RCT) which is defined as
a trial in which participants are randomly assigned to one of two or more groups: the experimental group or groups receive the intervention or interventions being tested; the comparison group (control group) receive usual care or no treatment or a placebo. The groups are then followed up to see if there are any differences between the results. This helps in assessing the effectiveness of the intervention.(CASP, 2020)
To practise following this framework for critically appraising a quantitative article, please look at the following article:
Marrero, D.G. et al (2016) 'Comparison of commercial and self-initiated weight loss programs in people with prediabetes: a randomized control trial', AJPH Research, 106(5), pp. 949-956.
How to use this practical example