The Journal of Clinical Psychiatry The Journal of Clinical Psychiatry

The Journal of
Clinical Psychiatry

Master Key Statistical Concepts
for Informed Clinical Decisions

Biostats Made Simple

Explore essential statistical concepts explained simply to help clinicians better understand medical research by Chittaranjan Andrade, MD. Key topics such as effect sizes, risk ratios, and clinical trial data interpretation are broken down to support informed decision-making. This resource is tailored for clinicians and mental health professionals looking to deepen their knowledge of biostatistics and apply it to evidence-based practice.

JCP
Using Percentiles to Understand Standardized Mean Difference as a Measure of Effect Size
Clinical and Practical Psychopharmacology

August 7, 2023

Chittaranjan Andrade, MD, explains the use of SMDs as a measure of effect size. A recent meta-analysis of the effect of ChEIs on hallucinations and delusions in Alzheimer and…
Chittaranjan Andrade
JCP
Understanding Misunderstandings About the Relative Risk and Odds Ratio
Clinical and Practical Psychopharmacology

June 5, 2023

Using simple concepts and arithmetic, Chittaranjan Andrade, MD, teaches readers how to derive and interpret relative risk and odds ratios.
Chittaranjan Andrade
JCP
Understanding 95% Confidence Intervals Around Relative Risk, Odds Ratio, and Hazard Ratio
Clinical and Practical Psychopharmacology

May 31, 2023

Dr Chittaranjan Andrade explains, in simple terms, an important concept: how to interpret 95% CIs for statistics expressed along an exponential scale.
Chittaranjan Andrade
JCP
Clinical and Practical Psychopharmacology

February 18, 2021

In this article, Dr Andrade helps readers identify several types of statistical analysis that violate scientific principles and that researchers may knowingly—or unknowingly—engage in.
Chittaranjan Andrade
JCP
Clinical and Practical Psychopharmacology

October 6, 2020

Read a full article on the basics of conducting meta-analysis. What it is, why it is necessary, and how to interpret a forest plot.
Chittaranjan Andrade
JCP
Clinical and Practical Psychopharmacology

September 22, 2020

Measures and methods used in RCTs vary, so how can we combine their findings to synthesize the evidence? Read this article to gain a better understanding of meta-analysis methodology…
Chittaranjan Andrade
JCP
Clinical and Practical Psychopharmacology

March 24, 2020

The fragility index is the smallest number of subjects whose status needs to change for a significant finding to lose its significance. Read this article to learn about the…
Chittaranjan Andrade
JCP
Clinical and Practical Psychopharmacology

May 28, 2019

Do P values tell the whole story? Dr Andrade highlights the importance of statistical methods as he considers the findings of a study that evaluated risk of intellectual disability…
Chittaranjan Andrade
JCP
Clinical and Practical Psychopharmacology

January 22, 2019

Was the adverse event caused by the drug or by the condition itself? In this installment of his column, Dr Andrade points to the importance of controlling for confounding…
Chittaranjan Andrade
JCP
Clinical and Practical Psychopharmacology

November 27, 2018

Could you tell the difference between an odds ratio and a risk ratio? Learn how in this Clinical and Practical Psychopharmacology offering, in which Dr Andrade illustrates these important…
Chittaranjan Andrade
JCP
Clinical and Practical Psychopharmacology

February 22, 2017

Propensity score matching, or the probability that a subject will receive a particular treatment, is one way to address baseline differences between treatment groups in observational studies. In this…
Chittaranjan Andrade
JCP
Clinical and Practical Psychopharmacology

January 25, 2017

The likelihood of being helped or harmed (LHH) ratio is a measure of the unique association of a treatment with a favorable outcome versus its unique association with an…
Chittaranjan Andrade

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