Table 2. Baseline characteristics of the study population.

Values are shown as number only, number (%), or mean ± standard deviation. Missing data values were excluded.

KT-QoL, Korean version of the self-reported thyroid-specific quality of life questionnaire for thyroid cancer patients; TSH, thyroid-stimulating hormone; BMI, body mass index; COPD, chronic obstructive pulmonary disease.

^a)In female only. ^b)In patients with comorbidity only.

^*P < 0.05.