Level of evidance

Level of evidence:-

In the past many times I entered a debate with my friends about anything relating to our studies, recently I entered one too hahaha! Sometimes it ended in a difference in our teacher’s words and for example a book or the internet, so I always think whose words are better? Whom should I take as a better argument?

Recently my father asked me a question, do you know what the different levels of evidence are? Typically I didn’t know what are they, but looking them up I found that they were the answer to my question!

Here is a summary for the levels of evidence:-

Evidence is divided into seven levels from the weakest till the strongest

Level(7):- Argument from authority

It’s the opinion of someone who is an expert in the field or who has authority like a teacher for example! In other words my teacher’s argument is a level 7 evidence

Level(6):- a descriptive or qualitative study

A qualitative descriptive study is a comprehensive summarization, in everyday , of specific events. This is the second least strong evidence cuz it is under the influence of misconception & simply biase

Level(5):- meta-synthesis

the systematic review and integration of findings from qualitative studies i.e systematic review of the product from level 6

A systematic review means:- a summary of all of the literature on a particular topic, that meets pre-defined eligibility criteria (nope didnt get what it means tbh)

Level(4):- a case control or cohort studies

1- case control:- A study that compares patients who have a disease or outcome of interest (cases) with patients who do not have the disease or outcome (controls

2- cohort studies:- a type of research design that follow groups of people over time

Level(3):- quasi-experiment

a type of research design that attempts to establish a cause-and-effect relationship, through the help of an non randomized controlled trials.

Non randomized controlled trials (nonRCTs):- A clinical trial in which the participants are not assigned by chance to different treatment groups.

Level(2):- one randomised controlled trials (RCTs)

a trial in which subjects are randomly assigned to one of two groups: one (the experimental group) receiving the intervention that is being tested, and the other (the comparison group or control) receiving an alternative (conventional) treatment

Level(1):- three ways to achieve this level

A) a meta-analysis of all RCTs:- a systematic review or a statistical analysis that combines the results of multiple scientific studies.

B) 3 RCTs of good quality

C) evidence-based clinical practice guidelines:- systematically developed statements to assist practitioner and patient decisions about appropriate health care for specific clinical circumstances

Hopefully you received new informations from this blog

My reference:-

https://libguides.winona.edu/ebptoolkit/Levels-Evidence