The study included 2,705 individuals aged 19-65 working in various occupations. Data were collected using a demographic structure survey and the Behaviors Scale Towards Sustainable Nutrition (BSSN). A food consumption frequency survey was administered to calculate the EAT-Lancet Index. Occupations were classified into five groups according to the International Standard Classification of Occupations (ISCO)-88: Groups 1-2, 3-4, 5-8, 6-7, and 9-10. Additionally, occupational skill levels were categorized into four levels (1 being the lowest and 4 the highest) based on ISCO-88.

Food components in the EAT-Lancet diet are classified as "restricted foods" and "emphasized foods." Restricted foods include pork, beef, lamb, poultry, potatoes, eggs, and added sugar. Emphasized foods include fruits, vegetables, legumes, unsaturated fats, fish, whole grains, and nuts. Dietary intake is assessed based on the reported amounts in grams per day of uncooked weight, aligning with the target intake levels specified in the EAT-Lancet diet.

The index consists of 14 food components, with each scored from 0 to 3. A score of 0 indicates low adherence to the target for a given food component, while a score of 3 reflects high adherence. The total index score ranges from 0 (no adherence) to 42 (perfect adherence, calculated as 14 components × 3 points). The food consumption frequency method was used to calculate the EAT-Lancet Index.

The scale was developed to measure sustainable consumption behaviors. It consists of 11 questions in total and uses a 7-point Likert format. The scale is divided into two subsections that assess individuals' nutrition and purchasing preferences. A minimum of 0 and a maximum of 66 points are obtained from the scale. Higher scores on the scale indicate stronger sustainable food consumption behaviors.