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Sample size calculation in clinical research [PDF]

Perspectives in Clinical Research
Calculation of sample size is an essential part of research study design since it affects the reliability and feasibility of the research study. In this article, we look at the principles of sample size calculation for different types of research studies.
Priya Ranganathan, Vishal Deo, C. S. Pramesh   +2 more
doaj   +2 more sources

Sample size for cluster sampling

Journal of Family Medicine and Primary Care, 2017
Laura Cecilia Gómez-Arrambide, German F. Alvarado, Andrea Celi-Villacorta, Bárbara Olenka Sánchez-Palomino   +3 more
openaire   +5 more sources

Sample size estimation

The Journal of Indian Prosthodontic Society, 2017
N Gopi Chander
openaire   +5 more sources

Sample size calculation

Indian Journal of Ophthalmology, 2012
Rajeev Kumar
openaire   +5 more sources

An evaluation of sample size requirements for developing risk prediction models with binary outcomes [PDF]

BMC Medical Research Methodology
Background Risk prediction models are routinely used to assist in clinical decision making. A small sample size for model development can compromise model performance when the model is applied to new patients.
Menelaos Pavlou, Gareth Ambler, Chen Qu, Shaun R. Seaman, Ian R. White, Rumana Z. Omar   +5 more
doaj   +2 more sources

Dependence of the sample estimates on the sample size [PDF]

E3S Web of Conferences, 2020
The paper provides data on the dependence of the sample indicators of the arithmetic mean, variance, asymmetry and excess of the length of the needles of European spruce (Picea rubra) and European larch (Larix decidua), the average length of a pair of ...
Kozlov Grigorii, Pushkarev Mikhail, Belyaev Daniil   +2 more
doaj   +1 more source

Sample size considerations in research

Endodontology, 2023
“What should be the sample size for my study?” is a common question in the minds of every research at some point of the research cycle. Answering this question with confident is tough even for a seasoned researcher.
Shyam Sivasamy
doaj   +1 more source

COMPARISON OF FREQUENTIST AND BAYESIAN APPROACHES ON SAMPLE SIZE: METHODOLOGIC STUDY

Sabiad, 2023
Objective: In the present study, we aimed to evaluate the effects of sample size on results of study by using frequentist and Bayesian approaches.Material and Methods: The small sample consisted of 32 patients with ischemic heart disease (IHD) and 37 ...
Cennet Yıldız, Eray Yurtseven, Fatma Nihan Turhan Çağlar, Mehmet Güven Günver   +3 more
doaj   +1 more source

Understanding Current Methods for Sampling of Aflatoxins in Corn and to Generate a Best Practice Framework

Toxins, 2022
Aflatoxin contamination in corn is a significant issue, posing substantial health threats to humans and animals. Aflatoxin testing protects consumer health, ensures the safe global trade of corn, and verifies compliance with legislation; however ...
Rossa Donnelly, Christopher Elliott, Guangtao Zhang, Bob Baker, Julie Meneely   +4 more
doaj   +1 more source

Characterising and justifying sample size sufficiency in interview-based studies: systematic analysis of qualitative health research over a 15-year period

BMC Medical Research Methodology, 2018
Background Choosing a suitable sample size in qualitative research is an area of conceptual debate and practical uncertainty. That sample size principles, guidelines and tools have been developed to enable researchers to set, and justify the ...
Konstantina Vasileiou, Julie Barnett, Susan Thorpe, Terry Young   +3 more
doaj   +1 more source