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HARMONIZED DATA

Label:s14puffeff
Description:s14puffeff:w14 amount effort s gave to lung function test
Item type:Constructed variable
Answer type:Enumerated
Answer choices: 1.Gave full effort ; 2.not full effort-illness ; 3.not full effort-no reason ; .n:Not willing/able ; .s:Skipped ; .u:not coupled ; .v:SP NR
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