Results 111 to 120 of about 17,051,082 (142)
Some of the next articles are maybe not open access.
Annals of Internal Medicine, 1983
Excerpt To the editor: Young, Bresnitz, and Strom (1) present two nomograms for sample size determination when the response variable is either dichotomous or approximately normal.
openaire +3 more sources
Excerpt To the editor: Young, Bresnitz, and Strom (1) present two nomograms for sample size determination when the response variable is either dichotomous or approximately normal.
openaire +3 more sources
American Journal of Infection Control, 2012
A quick review of the basics of sample size and power is presented. Readers can participate in an online exercise that introduces them to a power calculator that can be used in their practice, and illustrates the concepts discussed in the article.
openaire +2 more sources
A quick review of the basics of sample size and power is presented. Readers can participate in an online exercise that introduces them to a power calculator that can be used in their practice, and illustrates the concepts discussed in the article.
openaire +2 more sources
How to calculate sample size for observational and experiential nursing research studies?
National Journal of Physiology Pharmacy and Pharmacology, 2019Sample size estimation for a research study is the most crucial part of the research process because it helps to produce reliable results which improve generalizability of study results.
S. Sharma +3 more
semanticscholar +1 more source
Encyclopedic Dictionary of Archaeology, 2019
Throughout this chapter, I’ve stressed the importance of recruiting a statistician as co-principal investigator right at the start of formulating the question for your RCT. Why, then, intrude on their turf with a section on sample size?
S. Chow
semanticscholar +1 more source
Throughout this chapter, I’ve stressed the importance of recruiting a statistician as co-principal investigator right at the start of formulating the question for your RCT. Why, then, intrude on their turf with a section on sample size?
S. Chow
semanticscholar +1 more source
2007
In this chapter, we discuss the concept of statistical power and show how the sample size can be chosen to ensure a desired power. Power is the probability of rejecting the null hypothesis when the null hypothesis is false, that is the probability of saying there is a difference when a difference actually exists.
Walter T. Ambrosius, L. Douglas Case
openaire +3 more sources
In this chapter, we discuss the concept of statistical power and show how the sample size can be chosen to ensure a desired power. Power is the probability of rejecting the null hypothesis when the null hypothesis is false, that is the probability of saying there is a difference when a difference actually exists.
Walter T. Ambrosius, L. Douglas Case
openaire +3 more sources
2013
In this chapter several sample size calculation formulas are introduced. They include the standard sample size calculation formula for both continuous and dichotomous outcomes as well as the adjustments for either clustering (i.e., for a cluster RCT) or designs with more than one follow-up measurement. Besides the formulas and an example how to use the
openaire +2 more sources
In this chapter several sample size calculation formulas are introduced. They include the standard sample size calculation formula for both continuous and dichotomous outcomes as well as the adjustments for either clustering (i.e., for a cluster RCT) or designs with more than one follow-up measurement. Besides the formulas and an example how to use the
openaire +2 more sources
The Lancet, 1993
A preliminary analysis of data obtained during Britain's first large national survey of sexual attitudes and lifestyles has lately been published.1 This survey was designed to estimate the size of the HIV epidemic and to collect data that could be used to formulate effective preventive strategies.
openaire +3 more sources
A preliminary analysis of data obtained during Britain's first large national survey of sexual attitudes and lifestyles has lately been published.1 This survey was designed to estimate the size of the HIV epidemic and to collect data that could be used to formulate effective preventive strategies.
openaire +3 more sources
Sample Size in Qualitative Interview Studies
Qualitative Health Research, 2016K. Malterud, V. Siersma, A. D. Guassora
semanticscholar +1 more source
BMJ, 2010
A randomised controlled trial investigated whether a computerised feedback device modified eating behaviour and resulted in weight loss in obese adolescents.1 The primary outcome was change in body mass index (BMI) from recruitment to 12 months. BMI was calculated as weight (kg)/[height (m)]2, adjusted for age and sex.
openaire +4 more sources
A randomised controlled trial investigated whether a computerised feedback device modified eating behaviour and resulted in weight loss in obese adolescents.1 The primary outcome was change in body mass index (BMI) from recruitment to 12 months. BMI was calculated as weight (kg)/[height (m)]2, adjusted for age and sex.
openaire +4 more sources