help for

iciss-------------------------------------------------------------------------------

Title

iciss-- ICD-9 based Injury Severity Score

VersionVersion 3.0.

ICDPIC Version 3.0 requires STATA 8.0 or higher. ICDPIC Version 3.0 has been tested in STATA 10 and STATA 11, but the authors believe it should also work without incident in STATA 8 and STATA 9. If you have any problems using ICDPIC Version 3.0 in STATA 8 or STATA 9, please inform the authors.

ICDPIC Version 3.0 may be installed from within STATA using the

ssccommand. If you installed a previous version of ICDPIC from the SSC archives website using thessccommand, we suggest that you first delete it by typingssc uninstall icdpicfollowed byssc install icdpic. Alternatively, you may usessc install icdpic, replace. See help for ssc.If you installed any previous ICDPIC files obtained directly from the authors, please delete them

ALL(.ado, .hlp and .dta files) to avoid any conflicts with ICDPIC 3.0 files.Please enter complete variable names in the ICDPIC Version 3.0 dialog boxes. Do not use abbreviations.

New to Version 3.0 is the addition of a dialog box (.dlg) file associated with each individual ICDPIC Version 3.0 program (.ado) file. To access the ICDPIC dialog box, and all the ICDPIC programs, type:

db icdpic. Typingicdpic, as in earlier versions, will still work, butONLYwithicdpic. For example, to access the ICISS program directly, type:dbiciss. Typingiciss, as in previous versions, will produce an error.Fixed in ICDPIC Version 3.0 is the ability to use path\file names containing spaces.

Fixed in ICDPIC Version 3.0 is the ability to run in STATA 11.0.

Fixed in ICDPIC Version 3.0 is a bug that caused the

trissprogram to crash if thertsvariable was named anything other than "rts".New in ICDPIC Version 3.0 (

traumaprogram only) is the ability to choose whether an AIS value of 6 automatically forces an ISS of 75 or to automatically have all AIS values of 6 changed to an AIS value of 5 and then have the ISS calculated normally.All dialog boxes in ICDPIC Version 3.0 have memory. Each time a dialog box is opened within the same STATA session, it will remember the values last entered.

All dialog boxes in ICDPIC Version 3.0 have the following buttons:

OKexecutes the program and removes the dialog box from the screen.

SUBMITexecutes the program and leaves the dialog box on the screen. Note that if an error message is generated the dialog box may be minimized.

CANCELremoves the dialog box from the screen and does nothing. Clicking on the close icon of the dialog box does the same thing.

HELPleaves the dialog box on the screen and presents the program help file. TheHELPbutton has a question mark on it.

COPYleaves the dialog box on the screen and copies the program command to the clipboard.

RESETresets the values of the controls in the dialog box to their initial state, just as if the dialog box were invoked for the first time. Each time a user invokes a dialog box, its controls will be filled in with the values the user last entered.RESETrestores the control values to their defaults. TheRESETbutton has an R on it.

Syntax

db icissThe

ICISSdialog box will open. Follow the instructions.

OR

db icdpicThe

ICDPICdialog box will open. ChooseICISSand clickOKorSubmit. TheICISSdialog box will open. Follow the instructions.

Description

icisscalculates ICISS using both survival risk ratios (SRR's) and independent survival risk ratios (SRRi's).

ICISS= (SRR_1)(SRR_2)...(SRR_N)

ORICISS = (SRRi_1)(SRRi_2)...(SRRi_N)

where ICISS for SRR is defined as the product of all survival risk ratios (SRR's) for an individual patient's ICD-9-CM injury diagnosis codes (N-Codes). Similarly, ICISS for SRRi is defined as the product of all independent survival risk ratios (SRRi's) for an individual patient's N-Codes. See help for srr for more infomation on SRR's and SRRi's.

OptionsNone

RemarksThe user should first run

srroricdpicon his/her data to produce the necessary table of SRR and SRRi values. See help for srr.The user's data must contain ICD-9-CM diagnosis codes. Diagnosis codes in the user's data must be of type string. A decimal point in the diagnosis codes is optional. Diagnosis codes should have a width of 5 (6 if a decimal point is present). The diagnosis code prefix must be the same for all diagnosis codes and numbered sequentially starting with 1, for example, dx1...dxN.

srradds the following variables to a new copy of the user's data stored on disk:

srr_1-srr_n: survival risk ratio for ICD-9-CM diagnosis codes 1..nsrri_1-srri_n: independent survival risk ratio for ICD-9-CM diagnosis codes 1..nsrrprod: ICISS (product of srr values for all N-Codes)srriprod: ICISS (product of srri values for all N-Codes)min_srr: minimum srr value amongst all N-Codesmin_srri: minimum srri value amongst all N-Codessrr_cnt: number of srr values that were involved in computation of srrprodsrri_cnt: number of srri values that were involved in computation of srriprod

srrandsrrivariables for diagnosis codes that are not valid N-Codes will have missing values. If there are no valid N-Codes, variablessrrprod,srriprod,min_srrandmin_srriwill be missing and variablessrr_cntandsrri_cntwill be 0. If there are no valid N-Codes with an SRR, variables forsrrprodandmin_srrwill have missing values and variablesrr_cntwill be 0. If there are no valid N-Codes with an SRRi, variables forsrriprodandmin_srriwill have missing values and variablesrri_cntwill be 0.

srrandsrrivariables and variablessrrprod,srriprod,min_srrandmin_srriare rounded to the nearest 0.0001. If any of these values are equal, or round to, 0.0000 or 1.0000 they are replaced with 0.0001 and 0.9999 respectively.

ExamplesNone

AuthorsDavid E. Clark, M.D.

Maine Medical Center, Portland, Maine, USA University of Vermont College of Medicine, Burlington, Vermont, USA Harvard Injury Control Research Center, Harvard School of Public Health, Boston, Massachusetts, USA

Correspondence to Dr. Clark, 887 Congress Street, Portland ME 04102 Email: clarkd@mmc.org

Turner M. Osler, M.D.

University of Vermont College of Medicine, Burlington, Vermont, USA

David R. Hahn

Maine Medical Center, Portland, Maine, USA

ReferencesOsler T, Rutledge R, Deis J, Bedrick E. ICISS: An International Classification of Disease-9 based injury severity score.

J Trauma1996;41:380-386.

Also seehelp for srr

help for icdpic

help for iciss