Document yb7qpz84QJ8omgVjJ8bd1LYw3

Date: To: From: Re: November 12,1985 Terry Leet, Epidemiologist Monsanto Company 800 N. Lindburgh Boulevard St. Louis, Missouri 63167 Adrienne Koranda Consulting Programmer Northwestern/Monsanto Health Study Completed Sample Tape Specifications The tape being characteristics: submitted to you today was written with the following IBM standard,labelled 9-track tape DSN = MEH.NWSTUDY.TAPE.SAMPLE VOL/SER = MEH EBCDIC 6250 BPI LRECL = 100 BLKSIZE = 6200 RECFM = FB . The format of the tape corresponds almost precisely with the codesheet you originally provided. All the variables there named were dumped back out, in the same form, with the exception of the following: - All missing values for dates, & RACE which were read as numerics, were written back out as ' . ' . - In the course of calculating birthdate conversions for the century changes, I found that the equations I used managed to convert well enough to do the calculations on age groupings that were necessary. However, when the birthdate itself was written back out for anyone before the turn of the century, the date reads as one day prior to the original! (shrug)! - VITAL STATUS = unknown is listed as 0 only. - The following coding changes as per your indication have been written to this tape: ss348050004 - ss35805044 ss351070877 - VITAL is 2 ss357037125 - VITAL is 2 ss333018142 - VITAL is 2 ss348168193 - TERMDATE is 060851 expcode=S lastname=Ray - VITAL is 2 The tape includes all of the exposed group, plus all of the unexposed active, retired, & transferred groups which you sent me. An additional stratified random sample, based on age, length of employment, and vital status was chosen from the terminated group. All of the above groups are included on the tape in order by socsec#. A final read of the tape you have yielded the crosstab on the following page. The only discrepancy seems to be that my EXPOSED TRANSFERRED population seems to number 57 instead of 56 as you reported. Since I changed no employment statuses, it seemed more expeditious to let you track down the culprit. DSW 476038.0786 STLCOPCB4042950 EXPOSED ACTIVE TRANSFERRED TERMINATED RETIRED 186 57 (1 PLANT) 356 . 186 total 785 UNEXPOSED 153 32 528 52 (NEW SAMPLE) 765 1550 As I understand it, you will next be presenting me with the updated names addresses and phone numbers of the people on this tape. Hope to hear from you soon. Thanks for all your help. Good Luck! DSW 476038.0787 STLCOPCB4042951