It depends on the type of assistance requested. For anything with a deadline (grants, abstracts,
etc.), we need to receive requests at least 60 days prior to the submission date. This allows us to
manage staffing levels and ensure that there is time to provide input on the study design. For
requests without a deadline (papers, analysis, etc.), please get in touch with us as early as possible.
Statistical assistance with grant development is provided for free for WFUSM faculty provided
that the Biostatistics Core is included in the grant budget.
Note: development of industry contracts will be
billed on an hourly basis upon successful receipt of contract. These funds should be built into the
All post-award work will be billed at an hourly rate. This includes data entry, data
management, meetings, data analysis, programming, writing, editing, paper revisions, etc.
These rates reflect current salary, fringe, and the PHS computing fees.
If we are assisting with a grant, we will need a description of all available pilot data, proposed
study design, an idea of the feasible sample size, and any other relevant information. If we are
assisting with data analysis, we will need the data (preferably electronically, in a format such as an
Excel spreadsheet; we will be happy to discuss how best to do this) and the questions of interest.
We have developed a set of web-based power calculators. SAS is used behind the scenes as the computational engine.
Existing designs include correlation, one-sample t-tests, two-sample t-tests, paired t-tests, onesample
frequencies, two-sample frequencies, and paired frequencies. Also available is a series of
questions to aid investigators in the selection of calculator.
We also recommend two free programs
that can be downloaded from the web, G*Power and PS. As always, we encourage
investigators to consult with a statistician when there are questions about these calculations.
Budgets are created in a collaborative manner. We will work with the investigator to establish a
scope of work and will budget accordingly. If there is only a fixed amount of money available, we
will discuss what can be accomplished for that amount.
Biostatistics Core is not a replacement for the collaborative research done in the Department of
Biostatistical Sciences (DBS) but an alternative arrangement for projects with more limited
involvement of DBS faculty and staff. We generally spend much less time on a project that comes
through Biostatistics Core than if we were receiving FTE-based support. Whether an individual project
should be handled through Biostatistics Core or through DBS as an FTE-based collaboration will be
discussed. Factors to consider would be project size and duration and whether a DBS faculty
member is available for an FTE-based collaboration.
We will evaluate rates on an annual basis and will change them if necessary when salaries
increase (October 1). We will bill at the current rates.
We record hours on a weekly basis with each week starting on a Monday. Bills are generated
on a monthly basis. The number of weeks per bill will vary slightly but will usually be either 4 or
5. For weeks that cross fiscal years, we will use the Monday to determine the fiscal year in which a
given week will be billed. Bills for internal clients will be submitted through the Controller’s
Office. External clients will be billed by mail or email.
This page has been adapted from the Design and Analysis Unit's (DAU) Frequently Asked Questions.
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