TY  -  
T1  - Characterization and Correction of Bias Due to Nonparticipation and the Degree of Loyalty in Large-Scale Finnish Loyalty Card Data on Grocery Purchases : Cohort Study 
SN  -  /  
UR  - http://hdl.handle.net/10138/324812 
T3  -  
A1  - Vuorinen, Anna-Leena; Erkkola, Maijaliisa; Fogelholm, Mikael; Kinnunen, Satu; Saarijärvi, Hannu; Uusitalo, Liisa; Näppilä, Turkka; Nevalainen, Jaakko 
A2  -  
PB  -  
Y1  - 2020 
LA  - eng 
AB  - Background: To date, the evaluation of diet has mostly been based on questionnaires and diaries that have their limitations in terms of being time and resource intensive, and a tendency toward social desirability. Loyalty card data obtained in retailing provides timely and objective information on diet-related behaviors. In Finland, the market is highly concentrated, which provides a unique opportunity to investigate diet through grocery purchases. Objective: The aims of this study were as follo... 
VO  -  
IS  -  
SP  -  
OP  -  
KW  - loyalty card data; diet; selection bias; weighting; raking; food; CHRONIC DISEASES; FOOD; FEASIBILITY; CONSUMPTION; 3141 Health care science 
N1  -   
PP  -  
ER  -