Chewing ability will be evaluated using a questionnaire to assess both subjective and objective aspects. The questionnaire will consist of open-ended and closed-ended questions to determine individuals' chewing difficulties. Open-ended questions will focus on identifying specific foods that present challenges during chewing and the strategies employed to consume these foods. In subsequent follow-up interviews, closed-ended questions will be used to evaluate the ability to chew the previously listed foods, with response options such as "easy to chew," "experiencing some difficulty," and "experiencing great difficulty/cannot chew at all." If participants indicate experiencing slight or significant difficulty chewing at least two of the hard foods and four of the soft foods, it will be considered indicative of chewing difficulties. This assessment will provide valuable insights into the participants' chewing function and its impact on their dietary habits and oral health.

The Oral Health Impact Profile-14 (OHIP-14) is a measurement tool developed to assess the impact of oral and dental health on individuals. It consists of 14 questions, and each question is rated on a scale of 0 to 4, with response options defined on a Likert scale as "0=never, 1=rarely, 2=sometimes, 3=often, and 4=always." The total score of OHIP-14 ranges from 0 to 56. A higher total score indicates increased severity of problems and decreased quality of life. In this study, OHIP-14 will be administered to participants to evaluate the impact of oral health on their daily functioning, well-being, and quality of life.

Physical activity levels of participants will be assessed using the International Physical Activity Questionnaire (IPAQ) short form. The IPAQ was developed with the support of the World Health Organization (WHO) and the Centers for Disease Control and Prevention (CDC), and its validity and reliability study was conducted in Turkey in 2010 by Sağlam et al. Individual Metabolic Equivalent Task (MET) scores will be calculated based on the IPAQ protocol to categorize participants into "low, moderate, and high activity levels." Total scores ranging from 0 to 600 will be classified as "low level," scores between 600 and 1500 or 3000 (depending on the number of days of moderate and vigorous physical activity per week) will be classified as "moderate level," and scores equal to or above 1500 or 3000 (depending on the number of days of moderate and vigorous physical activity per week) will be classified as "high level."