Critical Review of Self-reported Sleep Duration, Sleep Quality, and Breast Cancer Risk in a Population-based Case-Control Study

Running head: CRITICAL REVIEW
CRITICAL REVIEW
Name of the Student
Name of the University
Author’s Note

CRITICAL REVIEW1
Table of Contents
1. Study Description.....................................................................................................................2
2. Article Critique.........................................................................................................................2
2.1 Title and Abstract..................................................................................................................2
2.2 Introduction............................................................................................................................3
2.3 Materials and Methods..........................................................................................................3
2.4 Results....................................................................................................................................5
2.5 Discussion and Conclusion...............................................................................................5
2.6 References..............................................................................................................................6
2.7. Acknowledgements and funding..........................................................................................8
3. Over Assessment and Conclusions of the Article Critique......................................................9

CRITICAL REVIEW2
1. Study Description
In this, article the study is based on evaluation of the risk factors that are associated with
breast-cancer and its relation with sleep-duration and sleep-quality in western Australian women.
There are evidences of women suffering from cancer due to the improper sleep patterns. This
study is conducted through secondary data, which is done from population control based studies
in 2009-2011 in which the participants were give questionnaires about their sleep patterns.
Misclassification bias and selection analysis for potential selection is also conducted in this
study.
2. Article Critique
The major critique found in this article are the results which does not conclude to the
topic in question, the participants are not eligible as data for 5% of the sample were missing,
estrogen receptor testing were not detected in 169 women suffering from breast cancer. The basis
of the result of this study were not acceptable due to the inappropriate results achieved in the end
of the study. The contradiction in this article due to selective biases and misclassifications can be
an obstruction for it to be regarded as a concrete study on the subject matter of breast-cancer and
its association with the sleep pattern as well as sleep quality.
2.1 Title and Abstract
The research article titled-‘Self-reported Sleep Duration, Sleep Quality, and Breast
Cancer Risk in a Population-based Case-Control Study’ has been critiqued and analyzed in this
paper. The title mentions what is the research based on and the type of study is conducted. Case
control study is retrospective in nature, they compare the group who is suffering from the

CRITICAL REVIEW3
diseaseand the group who is not suffering from the disease.It shows an amount of significant risk
factors in the disease (Girschik, Heyworth and Fritschi, 2013).
2.2 Introduction
The critical review of this article will be donewith the help of STROBE guidelines as it
gives an efficient result in medical researches and literature. The experts and researchers
frequently use it for epidemiological studies. Readers need to what was planned, what was done,
what is found and what it all means. This ensures an accurate result in medical literature if
STROBE guidelines is used (Equator-network.org, 2019).
Breast cancer is a prevalent disease amongst the female population all around the world,
be it Australia or globally. Some factors which increase the chances of breast cancer is primary
genetic mutation, weight gain, lifestyle, radiation, carcinogenic food, alcohol addiction,
reproductive health complication and now there are some studies which also shows that the
quality of sleep and duration can impact the health of women (Cancer.org, 2019).
There has been a case of irregular sleep pattern in developed countries according to
international and Australian studies. Some studies also show that there is a reduction of around
13-36 minutes in the habitual sleep pattern. Although, results of shorter duration of sleep shows
signs of weakness, tiredness and lethargy and less links have been found to prove that it causes
breast cancer (Wang et al, 2015).
2.3 Materials and Methods
The ‘Breast Cancer Environment and Employment Study’ is based on a controlled trial,
done in Western Australia of the occupational and environmental risk factors. The sample-size
comprises of 1,000 cases and 2,000 age match control samples. The study was based upon the