Impact of Appointment Reminder Strategies on Smoking Cessation Clinic Attendance

The goal of this clinical trial is to learn whether different appointment reminder methods can improve attendance at an anti-smoking (smoking cessation) clinic among adult smokers. The main question it aims to answer is: "Which reminder method helps participants come to their scheduled smoking cessation clinic appointments most often?" Researchers will compare different appointment reminder methods with standard appointment scheduling to see if they help participants attend their clinic visits more often. Participants will: * Receive appointment reminders using different methods * Come to their scheduled visits at a smoking cessation (anti-nicotine) clinic

Inclusion Criteria: * Age ≥ 18 years. Confirmed diagnosis of nicotine dependence (F17 according to the International Classification of Diseases, 10th Revision \[ICD-10\]) and active patient status at the Smoking Cessation Clinic. * Provision of voluntary, written, informed consent to participate in the study and to be contacted by telephone or short text message. * Ability to independently provide information and operate a mobile phone. * At the time of study enrollment, attendance at an initial visit at the clinic. Exclusion Criteria * Age \< 18 years. * Lack of written, informed consent to participate in the study. * Inability to independently understand the study procedures or provide responses (e.g., due to dementia or a language barrier).