Table 2.

Secondary outcome measure questionnaires

Item	Description	Collected at baseline	Collected at 1 month	Collected at 3 months
Demographic characteristics	Age, sex, ethnic group, highest educational attainment and area deprivation (measured by Index of Multiple Deprivation [69])	✓	✗	✗
LDQ	Leeds Dependence Questionnaire, a 10-item questionnaire [44]	✓	✗	✗
Unit consumption of alcohol per week	TOT-AL, an online beverage-specific measure [22] which requires participants to enter the type and quantity of alcohol drinks consumed on each day of the past week	✓	✓	✓
AUDIT	Alcohol Use Disorders Identification Test [6], a 10-item questionnaire developed by the World Health Organization to identify problem drinking	✓	✗	✓
CORE-10	Clinical Outcomes in Clinical Evaluation questionnaire, [23], a 10-item questionnaire to measure current psychological global distress score developed and validated as a non-proprietary measure of psychological distress	✓	✗	✓
SCQ-8	Situational Confidence Questionnaire, [25], an 8-item questionnaire to measure confidence in avoiding alcohol in a range of situations	✓	✗	✓
CSQ-8	Client Satisfaction Questionnaire, an 8-item questionnaire developed to measure satisfaction with care provided by mental health services, [26, 27] and also used for assessing satisfaction with alcohol and other substance misuse programmes [28]	✗	✗	✓
Attendance	Whether participant attended CDAS or used HeLP-Alcohol at 1 month	✗	✓	✗
Adherence to the intervention (for those randomised to this arm),	Measured through automated recording of numbers of log-ins and numbers of pages visited at each log-in	✗	✗	✓
Other sources of support accessed during treatment	Using a drop down menu of options: group therapy, horticulture, acupuncture, art therapy, other therapies (participant to state in free text)	✗	✓	✓