Das MEDLOG-System ist vollständig Jahr-2000 kompatibel. Nachstehend finden Sie einige Informationen des Herstellers in Englisch:

MEDLOG and 2000 Compliance

MEDLOG is compliant with year 2000 requirements. Dates from years 2000 and beyond will be displayed correctly and can be entered without any procedural changes on your part. Previously entered dates from the 1900's (or 1800's) will be retained correctly. Date calculations will be made correctly.

MEDLOG stores dates internally as the number of days since the beginning of 1960. This currently provides a date range of 1871 to 2049. Beyond the year 2049, some change must be made to the MEDLOG System.

Up to this point, dates which were entered with a two-digit year were assumed to be in the 1900's. Dates in the 1800's or 2000's could be entered with a four-digit year, e.g. 8/23/1892. This assumption will be changed in 1999 (when your computer clock indicates 1999 or beyond). Beginning in 1999, two-digit years will be in the 2000's if they do not appear to be more than one year in advance of the current year. For example, in year 1999 a date entered as 11/21/49 will be in 1949 while a date entered as 11/21/00 will be 2000. As the current year progresses, so will the border between the 1900's dates and the 2000's dates. For example, in year 2011, a date entered as 11/21/08 will be in 2008 and a date entered as 11/21/98 will be in 1998. This rule will allow two-digit years to be conveniently used and requires four-digit year entries only for dates more than 1 year in advance or more than 99 years prior to the current year. This is fairly unusual in medical data.

Please note that once a date is entered, it is stored as described earlier and is not affected by any current year changes. Dates will continue to be displayed as two digits, which will be the norm for the next century, just as it is for the present.

If your databank has numeric variables representing years, it is your responsibility to interpret them correctly. For example, if you have a variable for the year of first symptom, and you have entered 68 for its value, you must know that this represents 1968. This is very unlikely to cause any confusion.

Some forms have not allowed room to enter dates with a four-digit year (a mimimum of 10 spaces). If you expect that you must enter dates with four-digit years, then you should review your forms and make the appropriate changes. In reality, if you are not entering dates from the 1800's now, it is equally unlikely that you will be needing four-digit years in the future.

The next release of MEDLOG (version 98-11) will incorporate the new two-digit year assumptions.

If you have any questions regarding dates, please call to discuss them. 

2000 compliance letter

To: All users of the MEDLOG Clinical Data Management System
From: Mike Mannion
Date: July 7, 1998
Subject: MEDLOG's Year 2000 Compliance

Over the past few months, IAC has received many inquiries regarding MEDLOG's "Year 2000 Compliance". Since MEDLOG was released in 1983, the product has used a special internal system to interperet date values, that allows every version of MEDLOG ever released to be Year 2000 Compliant. In essence, the "issue" regarding MEDLOG is a non-issue.

Please print out this page for your own internal records regarding your software and it's Year 2000 Compliance. If you have any questions regarding the Year 2000 issue, or if you need a hard-copy of this letter on IAC letterhead, please call me at (702) 832-4442, or email me at medlog@sierra.net.

Mike Mannion