These data are updated weekly.
Data exist for every visit to the BLSA by every participant.
AGE at visit is calculated to the nearest tenth of a year.
DECDT is the year of visit calculated to the nearest tenth of a year. It can be interpreted as follows:
.0 = January 1 - February 7 .1 = February 8 - March 15 .2 = March 16 - April 21 .3 = April 22 - May 27 .4 = May 28 - July 3 .5 = July 4 - August 8 .6 = August 9 - September 14 .7 = September 15 - October 20 .8 = October 21 - November 26 .9 = November 27 - December 31
The SAS System 09:22 Friday, October 30, 1998
CONTENTS PROCEDURE
Data Set Name: LIBRARY.INFOAD Observations: 16108
Member Type: DATA Variables: 4
Engine: REMOTE Indexes: 0
Created: 14:23 Thursday, October 29, 1998 Observation Length: 32
Last Modified: 14:23 Thursday, October 29, 1998 Deleted Observations: 0
Protection: Compressed: NO
Data Set Type: Sorted: NO
Label:
-----Engine/Host Dependent Information-----
Data Set Page Size: 8192
Number of Data Set Pages: 64
File Format: 607
First Data Page: 1
Max Obs per Page: 254
Obs in First Data Page: 229
Filename: DISK$BETA14:[BLS$CDS.BLS$SDF]INFOAD.SASEB$DATA
Host Format: AXP
Disk Blocks Allocated: 1080
-----Alphabetic List of Variables and Attributes-----
# Variable Type Len Pos Label
3 AGE Num 8 16 Age at Visit
4 DECDT Num 8 24 Year of Visit to the Nearest Tenth
1 IDNO Num 8 0
2 VISIT Num 8 8
Revised 11/3/1998 -- Send comments to our Web Master .