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Fully Validated Sample Size and Power Calculations
Determination
of the appropriate sample size is a crucial part of study
design. A study which is too small may produce inconclusive
results. At the same time we don't want to waste scarce resources
on a study which is larger than necessary. nQuery Advisor® helps you
to find the most efficient sample sizes for your research studies. nQuery Advisor® has helper tables to assist you to
specify the standard deviation and effect sizes which
you need to make sample size and power computations. It
also produces protocol-ready sample size statements in
accordance with FDA/ICH guidelines.
nQuery
Advisor's® intuitive and easy-to-use interface and superb
range of sample size tables makes it the choice of leading
statisticians, research organizations, and pharmaceutical
companies.
No
other sample size and power software measures up.
Calculate
your sample size with nQuery Advisor ® in 4 easy steps:
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Formulate the study design, outcome, analysis.
Use the nQuery Advisor Study Goal and Design box to select the right table.
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Use nQuery Advisor's spreadsheet-style tables to specify analysis parameters and expected differences.
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Enter sample size to have nQuery Advisor compute power (or interval width) or specify power to compute sample size.
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Quickly evaluate a range of scenarios with nQuery Advisor's tables and plots.
Choose the sample size which best satisfies your goals and plausible parameter values.
Finished?
Generate the sample size justification statement.
Click a button to have nQuery Advisor automatically
generate the statement you need for FDA / ICH submission.
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