EASi, Exposure Assessment Solutions

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Exposure Assessment Solutions, Inc

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Contact:
Paul Hewett, Ph.D.
(304) 685 7050
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IHDataAnalyst V1.26 (IHDA)

The IHDataAnalyst (IHDA) includes all of the features of the popular free Excel spreadsheet IHStats.xls in addition to Censored Data Analysis and Bayesian Decision Analysis. It is capable of analyzing from 1 to 2000 cases. The output can be exported to a built-in text editor, which then can be saved and recalled as a rich text file (rtf). In addition, all statistical output and graphs can be copied into a wordprocessor or slideshow.

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Example Report

Data entry
- data are entered using an Excel-like data grid and saved in standard Excel (1997-2003) *.xls format
- copy and paste from Excel
- handles up to 2000 measurements
Statistics:
- non-parametric (order) statistics
- descriptive statistics
- compliance statistics
- non-parametric compliance statistics
Goodness-of-fit analysis
- subjective (graphical analysis)
- objective (formal statistical tests for goodness-of-fit)
Censored Data Analysis
- statistical analysis of censored datasets (i.e., datasets that contain <LOD values)
Bayesian Decision Analysis
- calculation of probability that the true exposure profile is in a specific AIHA exposure control category or an EU Hazard Band
- select the appropriate class of respirator (i.e., Assigned Protection Factor)
- limit the analysis to a plausible parameter space
- professional judgment can be explicitly factored into the calculations
- adjustment for censored (i.e., <LOD) data
High resolution, customizable graphs
Report generator and editor:
- build a customized report, selecting only the relevant statistics and graphs
- edit and save as a rich text file (i.e., rtf file)
System requirements:
- Pentium processor
- 512MB RAM
- XGA monitor (i.e., 768x1024) or higher
- Windows 2000, 2000 Professional, XP, or XP Professional.

Features:

Category	Feature	IHDA
Sample size	Number of cases	2000
Variables	concentration, <LOD (date, group - note yet activated)	x
Variables	concentration, <LOD
Statistics	order (i.e., non-parametric) statistics	x
	descriptive statistics	x
	compliance statistics (parametric)	x
	compliance statistics (non-parametric)	x
Goodness-of-fit	graphs (time series, log-probit, histogram)	x
	statistical tests	x
	high resolution, customizable large graphs	x
Censored Data Analysis	left-censored datasets	x
	right-censored datasets (not yet activated in IHDA)	x
	Substitution methods, Log-probit Regression (LPR), Maximum Likelihood Estimation (MLE), beta-substitution	x
	Robust LPR and robust MLE	x
	Robust LPR and robust MLE for multiple censoring points	x
	Non-parametric (NP) methods: NP upper percentiles; Kaplan-Meier median, mean and upper percentiles	x
	Log-probit and Kaplan-Meier charts	x
	ad hoc non-parametric test of compliance for severely censored data	x
	high resolution, customizable large graphs	x
Bayesian Decision Analysis	exposure category Decision Charts	x
	AIHA Exposure Control Bands (0-4 or 1-5)	x
	EU Exposure Control Bands (D-A, NR) for vapors and particulates	x
	categorical prior	x
	univariate and bivariate priors	x
	customizable large decision charts	x
	customizable decision function charts	x
	censored data adjustment	x
	respirator and noise PPE selection charts	x
	high resolution, customizable large graphs	x
Report generation	automatic report builder	x
	report editor	x
	copy from Statistics output memo field and paste into a wordprocessor or slideshow	x
	copy and paste graphs into a wordprocessor or slideshow	x
Miscellaneous	program color scheme options	x
Miscellaneous	unit and scale conversions	x
Customer Support	telephone (30 days) and email (1 year)	x