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HARMONIZED DATA

Label:s7puffeff
Description:s7puffeff:w7 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 ; .m:Missing ; .n:Not willing/able ; .r:Refuse ; .s:Skipped ; .u:not coupled ; .v:SP NR
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