help for iciss -------------------------------------------------------------------------------
iciss -- ICD-9 based Injury Severity Score
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 ssc command. If you installed a previous version of ICDPIC from the SSC archives website using the ssc command, we suggest that you first delete it by typing ssc uninstall icdpic followed by ssc install icdpic. Alternatively, you may use ssc 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. Typing icdpic, as in earlier versions, will still work, but ONLY with icdpic. For example, to access the ICISS program directly, type: db iciss. Typing iciss, 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 triss program to crash if the rts variable was named anything other than "rts".
New in ICDPIC Version 3.0 (trauma program 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:
OK executes the program and removes the dialog box from the screen.
SUBMIT executes the program and leaves the dialog box on the screen. Note that if an error message is generated the dialog box may be minimized.
CANCEL removes the dialog box from the screen and does nothing. Clicking on the close icon of the dialog box does the same thing.
HELP leaves the dialog box on the screen and presents the program help file. The HELP button has a question mark on it.
COPY leaves the dialog box on the screen and copies the program command to the clipboard.
RESET resets 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. RESET restores the control values to their defaults. The RESET button has an R on it.
The ICISS dialog box will open. Follow the instructions.
The ICDPIC dialog box will open. Choose ICISS and click OK or Submit. The ICISS dialog box will open. Follow the instructions.
iciss calculates ICISS using both survival risk ratios (SRR's) and independent survival risk ratios (SRRi's).
ICISS = (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.
The user should first run srr or icdpic on 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.
srr adds 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..n srri_1-srri_n: independent survival risk ratio for ICD-9-CM diagnosis codes 1..n srrprod: 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-Codes min_srri: minimum srri value amongst all N-Codes srr_cnt: number of srr values that were involved in computation of srrprod srri_cnt: number of srri values that were involved in computation of srriprod
srr and srri variables for diagnosis codes that are not valid N-Codes will have missing values. If there are no valid N-Codes, variables srrprod, srriprod, min_srr and min_srri will be missing and variables srr_cnt and srri_cnt will be 0. If there are no valid N-Codes with an SRR, variables for srrprod and min_srr will have missing values and variable srr_cnt will be 0. If there are no valid N-Codes with an SRRi, variables for srriprod and min_srri will have missing values and variable srri_cnt will be 0.
srr and srri variables and variables srrprod, srriprod, min_srr and min_srri are 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.
David 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: email@example.com
Turner M. Osler, M.D.
University of Vermont College of Medicine, Burlington, Vermont, USA
David R. Hahn
Maine Medical Center, Portland, Maine, USA
Osler T, Rutledge R, Deis J, Bedrick E. ICISS: An International Classification of Disease-9 based injury severity score. J Trauma 1996;41:380-386.
help for srr
help for icdpic
help for iciss