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QTLENGTHPSNO
Length off cigarettes from first quit during pregnancy, number (Pregnancy and Smoking Supplement)

Codes and Frequencies



An 'X' indicates the category is available for that sample

00NIUX
011X
022X
033X
044X
055X
066X
077X
088X
1010X
1111X
1414X
1515X
1818X
2525X
98Unknown - not ascertainedX
99UnknownX