Mohamed Abbas, a science teacher at Senioritis.io

Mohamed Abbas
June 20, 2023
Public Health

Why The Association Between Sexual Intercourse and Fetal Death Is Not Necessarily Causal: A Science Perspective

An investigator examined cases of fetal death in 27,000 pregnancies and classified mothers according to whether they had experienced sexual intercourse within 1 month before delivery. It...

Mohamed Abbas
June 20, 2023
Public Health

Understanding Necessary and Sufficient Causes in Disease Development

Factor A, B, or C can each individually cause a certain disease without the other two factors but only when followed by exposure to factor X. Exposure...

Mohamed Abbas
June 20, 2023
Public Health

Understanding Necessary and Sufficient Causes of a Disease

Factor A, B, or C can each individually cause a certain disease without the other two factors but only when followed by exposure to factor X. Exposure...

Mohamed Abbas
June 20, 2023
Public Health

Importance of Random Assignment in Clinical Trials: Ensuring Comparable Study Baselines

The major purpose of random assignment in a clinical trial is to:a. Help ensure that study subjects are representative of the general populationb. Facilitate double blinding (masking)c....

Mohamed Abbas
June 20, 2023
Public Health

Why a Randomized Controlled Trial Is Critical in Determining the Efficacy of Medicine for Sore Throats

An advertisement in a medical journal stated that “2,000 subjects with sore throats were treated with our new medicine. Within 4 days, 94% were asymptomatic.” The advertisement...

Mohamed Abbas
June 20, 2023
Public Health

Maximizing Study Accuracy: The Importance of Double Blind or Double Masked Studies to Eliminate Observer and Subject Bias

The purpose of a double blind or double masked study is to:a. Achieve comparability of treated and untreated subjectsb. Reduce the effects of sampling variationc. Avoid observer...

Mohamed Abbas
June 20, 2023
Public Health

Exploring the Use of One-Sided Test in Studying the Association between Estrogens and Endometrial Cancer

In many studies examining the association between estrogens and endometrial cancer of the uterus, a one-sided significance test was used. The underlying assumption justifying a one-sided rather...

Mohamed Abbas
June 20, 2023
Public Health

Optimizing Clinical Trials: The Benefits and Limitations of a Planned Crossover Design

In a randomized trial, a planned crossover design:a. Eliminates the problem of a possible order effectb. Must take into account the problem of possible residual effects of...