Section A

A.1 Participant Demographics

Description

This section contains key participant attributes at the time of study enrolment. All data collection occurred in person. Each participant was also supplied with a unique identification number that can be used to link participant data from each section in this data set.

Timing of Data Collection

Data presented in this section were either collected at Visit 1 or Visit 2, which both occurred prior to randomisation during the screening process. Data relating to living situation were collected at Visit 1 and annually thereafter.

Summary of Data Dictionary

This section contains nominal and numeric data. Four variables in this section have been derived and presented to avoid participant identification. Each variable representing living situation data has been named sequentially to represent the timing of and sequential manner of data collection (annually). For example, AV6 indicates that data collection occurred at the annual visit in year 6 of follow-up.

A.2 Longitudinal Alcohol and Smoking

Description

This section contains baseline and longitudinal alcohol and smoking data. All questions relate to the occurrence and frequency of smoking and alcohol intake. All data collection occurred in person.

Timing of Data Collection

Data presented in this section were collected at Visit 1, which occurred prior to randomisation during the screening process, and annually thereafter. Participants were only asked once at baseline when they started smoking.

Summary of Data Dictionary

This section contains nominal, ordinal and discrete numeric data. All variables presented in this section represent raw participant data and no variables have been derived. Variables collected annually have been named sequentially to represent the timing of and sequential manner of data collection.