Forced vital capacity (FVC) is the volume of air that is exhaled quickly and forcefully following a deep inspiration. It is a pulmonary function test parameter and performed using spirometry. The best value obtained from three technically acceptable measurements is expressed as a percentage of the expected value calculated from age, gender and height.

Respiratory muscle strength will be determined by measuring the maximal inspiratory pressure (MIP) created in the mouth using a mouth pressure device and the maximum expiratory pressure (MEP) with personal antibacterial and antiviral disposable filters. During the MIP measurement, the patient is asked to make a maximum expiration, and the patient's nose is closed with a clip and then the patient's nose is closed with a clip and then the patient is asked to make a maximum inspiration for 1-3 seconds. During the MEP measurement, the patient is asked to make a maximum inspiration, and the patient's nose is closed with a clip and then the patient's nose is closed with a clip and then the patient's nose is closed with a clip and then the tests are repeated until no further improvement is observed and there is no difference of more than 5% between the 2 best values.

It is applied at 60% of maximal inspiratory pressure. After the device is placed in the mouth, the nose is closed with a clamp. The patient is asked to breathe in and out through the mouth for 10 minutes. Before starting the test, patients are informed that if they feel too much shortness of breath during the test, they can remove the device and the test will end in this way. Before and after the test, the SpO2 value is measured with a portable pulse oximeter attached to the finger; dyspnea perception is measured and recorded with the Modified Borg Scale.

A Jamar Hydraulic Hand Dynamometer (Jamar Hydraulic Hand Dynamometer, Cedarburg, England) will be used to measure hand grip strength. The Jamar hand dynamometer is considered the most reliable tool for measuring grip strength. Individuals are asked to sit with the shoulder adducted, the elbow flexed at 90°, the forearm in the middle position, and the wrist in a neutral position. Participants are asked to hold the handle and squeeze with the maximum force they can. The measurement begins with the dominant hand. Three consecutive measurements are taken for the dominant and non-dominant hands, with a 1-minute interval between measurements. The highest value of the three measurements is recorded.

Measurements will be made with a portable digital muscle strength tester (01165 manual muscle tester, Lafayette Instrument Co. Lafayette, USA) to evaluate knee extensor muscle strength. It will be applied while individuals are in a sitting position on the edge of the bed with their knees bent to 90° and the space between the back of the knee and the bed filled with a towel. Individuals are asked to cross their hands on their chest and sit with their bodies upright. When the test begins, the knee is bent and the knee is straightened. The researcher measures the knee extensor muscle strength by applying force slightly above the ankle and trying to push downward in order to overcome the straight knee force. The test is repeated three times to measure the right and left knee extensor muscle strength and the highest value obtained is recorded in kilograms (kg) and Newtons (N).

It is performed using a spirometer. The best value obtained from three technically acceptable measurements is expressed as a percentage of the expected value calculated from age, gender and height. The patient must be in an upright sitting position during the test.

forced expiratory volume in 1 second (FEV1) is the volume of air exhaled in the first second from the beginning of the forced vital capacity maneuver. In general, it provides information about the restriction in the large airways. It is a pulmonary function test parameter and performed using spirometry. The best value obtained from three technically acceptable measurements is expressed as a percentage of the expected value calculated from age, gender and height.

Forced expiratory flow between 25 and 75% of vital capacity (FEF 25-75) is the average flow rate at 50% of the forced vital capacity maneuver. It provides information about the obstruction in medium and small bronchi. It is a pulmonary function test parameter and performed using spirometry. The best value obtained from three technically acceptable measurements is expressed as a percentage of the expected value calculated from age, gender and height.

Peak expiratory flow (PEF) is measured with a maximum inspiration followed by a maximum exhalation maneuver. It provides information about obstruction in the large airways. It is a pulmonary function test parameter and performed using spirometry. The best value obtained from three technically acceptable measurements is expressed as a percentage of the expected value calculated from age, gender and height.

A low FEV1/FVC ratio (<80%) is used as a primary obstruction parameter. It is a pulmonary function test parameter and performed using spirometry. The best value obtained from three technically acceptable measurements is expressed as a percentage of the expected value calculated from age, gender and height.

The Leicester cough questionnaire is a short, easy-to-apply, valid questionnaire developed to investigate the effect of chronic cough on quality of life. It includes 3 areas and 19 topics: physical, psychological and social. In this questionnaire, patients answer the questions themselves; they select the topics they identify as problems and rank them according to the importance attributed to them. The topics are divided into areas using clinical logic. A seven-point Likert scale is used for evaluation.The score for each area is calculated by dividing the patient's total score for each question by the number of questions. The score for each area ranges from 1 to 7. The total score is the sum of the 3 areas (physical, psychological and social) The total score range is 3 to 7. A higher score indicates a better health status. .

St. George's Respiratory Questionnaire (SQRQ): The effects of the disease on quality of life are examined in 3 sections: symptoms, activity and impact. SGRQ consists of 76 questions. It has a scale of 0 to 100 points. Zero indicates good health status, 100 indicates the worst disease status

Bouchard Three-Day Physical Activity Record: Bouchard's physical activity diary is an example of a widely used activity record in which participants report their activities every 15 minutes. Activities are rated from 1 to 9 (1 = sedentary, 9 = vigorous/vigorous activity) to obtain a total energy expenditure score. The resulting numbers are added together and multiplied by the MET values to calculate the estimated daily energy expenditure (kcal/kg1).