Details of Element: 50 Per Cent Flow Rate
Component of Pulmonary Function


Unique Name: pecef3
Contained in the Common BLSA Data Set ? No

Data Points (as of 09/06/98) Males Females Total
Number of Data Points 5223 877 6100
Number of Distinct Participants 1119 392 1511
Year First Collected 1962 1978 -
Year Last Collected 1986 1986 -

Type of Variable: Absolute Measure
Encoding: Continuous
Units of Measure: (undeclared)
Precision: ##.##
Anticipated Range: 00.00 thru 99.99
Masterfile Index: 116-01-47
Related Data Elements: none
Specific to this Data Element:
    Inclusion/Exclusion Rules: n/a
    Descriptive History: (none)
Details for this Data Type


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