« previous next »

Author Question: Why do we characterize a meta-analysis as being an observational study (versus an ... (Read 54 times)

olgavictoria

  • Hero Member
  • *****
  • Posts: 528
on: Jul 24, 2018
Why do we characterize a meta-analysis as being an observational study (versus an experiment)?

Question 2

Name three possible problems with meta-analysis.


ecox1012

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Jul 24, 2018
Answer to Question 1

THE VARIOUS TREATMENTS CANNOT BE RANDOMLY ASSIGNED ACROSS STUDIES; CONFOUNDING VARIABLES MOST LIKELY EXIST.

Answer to Question 2

ANY THREE OF THE FOLLOWING ARE OK: 1) SIMPSON'S PARADOX; 2) CONFOUNDING VARIABLES; 3) SUBTLE DIFFERENCES IN TREATMENTS OF THE SAME NAME; 4) THE FILE DRAWER PROBLEM; 5) BIASED OR FLAWED ORIGINAL STUDIES; 6) STATISTICAL SIGNIFICANCE VERSUS PRACTICAL IMPORTANCE; 7) FALSE FINDINGS OF NO DIFFERENCE.'


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

Did you know?

Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

Did you know?

In inpatient settings, adverse drug events account for an estimated one in three of all hospital adverse events. They affect approximately 2 million hospital stays every year, and prolong hospital stays by between one and five days.

Did you know?

Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

Did you know?

To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

An investment versus a bill An investment versus a bill
Eugène Delacroix, Study for The Death of Sardanapalus. Eugène Delacroix, Study for The Death of Sardanapalus.
Multiplexed fluorescent microbead assays. Multiplex analysis for the ENA antigens, Sm, RNP, SS-A, ... Multiplexed fluorescent microbead assays. Multiplex analysis for the ENA antigens, Sm, RNP, SS-A, ...
Income per Capita versus Income of the Bottom Quintile Income per Capita versus Income of the Bottom Quintile
The steps in the process of creating a karyotype for chromosome analysis. The steps in the process of creating a karyotype for chromosome analysis.
GENETIC ANALYSIS 15.1 (3 of 5) GENETIC ANALYSIS 15.1 (3 of 5)
Video: Proteins

For a complete list of videos, visit our video library