NOTE: The IHDA-LE is provided as a courtesy to attendees of the EAS Inc. PDCs
and courses. There is no customer support; however, if you experience computer-related
problems using the IHDA-LE or feel that the results are in error please send
an email to EAS Inc.
The IHDA-LE includes all of the features of the popular free Excel spreadsheet
IHStats.xls, plus Censored Data Analysis and Bayesian Decision Analysis capabilities.
It is capable of analyzing up to 25 measurements and has many features of the
commercial version. It does not have any built-in reporting capabilities; however,
the statistical output and graphs can be copied and pasted into a wordprocessor
or slideshow.
The full, commercial version has numerous additional capabilities that permit
the user to better analyze exposure data, particularly censored data, as well
a report generation feature that eases the task of documenting a statistical
analysis and generating a final report. Below is a side-by-side comparison of
the features of the IHDA-LE and the IHDA:
|
Category
|
Feature
|
IHDA
|
IHDA-LE
|
|
Sample size
|
Number of cases
|
2000
|
25
|
|
Variables
|
concentration, <LOD (date, group - note yet activated)
|
x
|
|
|
concentration, <LOD
|
|
x
|
|
Statistics
|
order (i.e., non-parametric) statistics
|
x
|
x
|
|
descriptive statistics
|
x
|
x
|
|
compliance statistics (parametric)
|
x
|
x
|
| compliance statistics (non-parametric) |
x
|
x
|
|
Goodness-of-fit
|
graphs (time series, log-probit, histogram)
|
x
|
x
|
| statistical tests |
x
|
x
|
|
high resolution, customizable large graphs
|
x
|
|
|
Censored Data Analysis
|
left-censored datasets |
x
|
x
|
| left- and right-censored datasets (not yet activated
in IHDA) |
x
|
|
| Substitution methods and Log-probit Regression
(LPR) |
x
|
x
|
| Maximum Likelihood Estimation (MLE) |
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
|
x
|
|
AIHA Exposure Control Bands (0-4 or 1-5)
|
x
|
x
|
|
EU Exposure Control Bands (D-A, NR) for vapors and particulates
|
x
|
|
| categorical prior |
x
|
x
|
| univariate and bivariate priors |
x
|
|
|
customizable large decision charts
|
x
|
|
| customizable decision function charts |
x
|
|
| censored data adjustment |
x
|
|
| respirator 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
|
x
|
| copy and paste graphs into a wordprocessor or slideshow |
x
|
x
|
|
Miscellaneous
|
program color scheme options |
x
|
|
| unit and scale conversions |
x
|
|
|
Customer Support
|
telephone (30 days) and email (1 year)
|
x
|
|
