Alcohol consumption Not Applicable
Conditions
Interventions
General population households will be exposed to two conditions over time, randomised in their order of presentation and separated by a wash-out period.
The two conditions comprise pu
Sponsors
University of Cambridge (UK)
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: Eligible participants are adults meeting the following criteria: 1. Purchase wine at a minimum rate of 2 x75cl bottles/week (1.5 litres) for their household 2. Usually purchase wine online or are willing to purchase wine online 3. Willing to consume wine(s) exclusively from the study wine list and order a total of approximately six weeks’ worth of wine 4. Live within a 3-mile radius of a retailer store that stocks the study wine in both target sizes (Appendix II) 5. Have a smartphone or similar device from which to send photographs of wine consumed Recruited participants will represent households due to them purchasing for their household. The trialists will not recruit more than one participant representing any one household
Exclusion criteria
Exclusion criteria: 1. Take medications for which there is a recommendation against alcohol consumption 2. Have a history of becoming ill after alcohol consumption, requiring hospitalisation 3. Have a history of alcoholism or a serious mental illness (including paranoid and other psychotic disorders, bipolar disorders and schizoaffective disorders) Added 20/06/2019: 4. If households drink more than 8 x bottles of 75cl wine a week (in the home) they would not be eligible to take part in the study
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Volume of wine in millilitres consumed by day 14 of each of the two intervention periods. This will be estimated through photographs of all wine bottles (completed & any partially finished) purchased as part of the study, sent by participants to the researchers. Estimates from partially finished bottles will be based on the following procedures: 1. Each wine bottle available on the study wine list will be purchased and filled in l increments, taking a photo of the bottles at each known volume. Smaller increments (10cl) will be used at the top (neck) & bottom (dimple) of the bottles where the relationship to height is non-linear. 2 Photographs with *known* volumes will be used to measure the height of the liquid and the height of bottle, to account for the bottle being at different distances from the camera. 3. Information regarding the height of the liquid, the height of the bottle and the known volume will be collated into a spreadsheet, in which height values will be expressed as a percentage (height liquid: height glass). 4. Either a model per bottle will be created based on the height percentage and volume values. (e.g. using an arcTan transformation), or numerical approximation using linear interpolation between lookup values will be used if no suitably fitting model is discovered. Preliminary estimates of error will be calculated, to inform the participant instructions on photography & choice of modelling. These models will be used to estimate the volume of leftover wine from the height percentage estimated from participants’ photographs. Added 22/07/2019: Main covariates for primary outcome: 1. Variables for i) the bottle type used, ii) the order in which participants were allocated to the two bottle sizes (i.e. sequence effect), and iii) the period in which a measurement was taken 2. Amount of wine consumed by participants’ guests, | — |
Secondary
| Measure | Time frame |
|---|---|
| Rate of wine consumption during each intervention period. This will be reported as the time taken (in days) to consume units of 1.5 litres, estimated through self-reported times at which each bottle of wine was started and finished and photographs of the wine bottles purchased as part of the study. | — |
Countries
England, United Kingdom
Outcome results
None listed