smoking status 12m

Smoking status at 12 months. Refer to smoking_12m_source for the source of the measurement. Values from GP records are within the range 3 months before the visit to 2 months after the visit. If a more precise measurement date is needed refer to smoking_12m_date.

Categorical

smoking date 12m

Date of smoking status at 12 months

Date

smoking source 12m

Source of smoking status at 12 months

Categorical

smoking status 6m

Smoking status at 6 months. Refer to smoking_6m_source for the source of the measurement. Values from GP records are within the range 3 months before the visit to 2 months after the visit. If a more precise measurement date is needed refer to smoking_6m_date.

Categorical

smoking date 6m

Date of smoking status at 6 months

Date

smoking source 6m

Source of smoking status at 6 months

Categorical

smoking status bl

Smoking status at baseline. Refer to smoking_bl_source for the source of the measurement. Values from GP records are within the range 3 months before the visit to 2 months after the visit. If a more precise measurement date is needed refer to smoking_bl_date.

Categorical

smoking date bl

Date of smoking status at baseline

Date

smoking source bl

Source of smoking status at baseline

Categorical