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7-2 STATPAC ANALYSIS & PRINTING RESULTS
REV. B 02/03 PN 51680-1 HUMPHREY FIELD ANALYZER II -
i
series
The Humphrey Field Analyzer II’s statistical software, STATPAC, provides immediate expert
system analysis of threshold visual field test results. With STATPAC you can analyze test results
at the time of examination, store test results and analyze them at your convenience, or recall
previously stored tests to analyze for comparative purposes.
STATPAC includes several exclusive features to help you judge visual field change.
• Using results from a single test, STATPAC can point out suspicious areas that otherwise
might not be evident until subsequent tests were done.
• STATPAC can identify areas that look suspicious but which, in fact, compare favorably
with normals data.
• Using results from a series of tests, STATPAC provides a highly sensitive and informative
analysis of changes in the patient’s visual field over time.
If you intend to run a STATPAC analysis, always take two important steps during testing:
1 . Make sure that the patient’s name and date of birth are entered exactly as they
were recorded on previous tests. Use the RECALL PATIENT DATA button as
described in Section 3: “Recalling Patient Data” to reduce patient data errors.
2 . Save the test results to disk (hard drive and/or floppy disk).
These steps will avoid errors when using printouts that require multiple files for the same
patient. Also, because STATPAC uses an age-adjusted model, the analysis cannot be performed
properly unless the patient’s date of birth is provided.
STATPAC threshold STATPAC offers statistical analysis and printouts in several formats: Single Field Analysis,
formats Overview, Change Analysis, and Glaucoma Change Probability Analysis.
The Single Field Analysis , as its name implies, analyzes the results of a single threshold test.
This is the default printout which provides the most information for a given test.
The Overview presents the results of up to sixteen (16) tests for convenient comparison. You
may view multiple test results per page for easier analysis.
The Change Analysis compares up to sixteen (16) tests and analyzes indices of change in the
patient’s field over time, flagging significant indicators for your attention.
The Glaucoma Change Probability Analysis highlights changes from a baseline which are
larger than the inter-test variability typically found in stable glaucoma patients.
INTRODUCTION TO
STATPAC
ANALYSIS
Performing a
STATPAC analysis
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