Association between smoking cessation and quality of life among patients with COPD in Tunisia

Abstract

Abstract Introduction Smoking cessation is the most important step to limit the complications of chronic obstructive pulmonary disease (COPD). Outcomes from studies that assessed the association between health-related quality of life (HRQL) and smoking cessation have been controversial. This study aimed to assess the relationship between HRQL and smoking cessation in patients with COPD in Tunisia. Methods A cross-sectional study was carried out in the two main primary care centers in the center of Tunisia over a period of three months (April-June 2016). Clinic and socio-demographic data were collected from patients' records. HRQL was assessed by the Medical Outcomes Study Short-form 36 (SF-36). This instrument is composed of two dimensions: physical and mental components. The questionnaire outcomes were described as means and standard deviation. T-test was performed to assess the statistical difference between the dependent and categorical variables. Results A total of 249 COPD patients participated in the study with a mean age of 67.77±11.13. Of this sample, 169 (67.9%) ceased smoking. The average period of smoking cessation was 10 years. The mean of total HRQL score in patients who ceased smoking was lower in comparison to patients who did not quit smoking (40.65±24.49, 43.37±24.49; respectively). The T-test reported a significant difference between the physical component of HRQL and smoking status. Patients with current smoking status had a better physical component score in comparison with patients who quit smoking (43.76±22.62, 37,86±18.21, p = 0.04, respectively). No significant differences were found between smoking cessation, mental component, and HRQL total score (p = 0.89, p = 0.39; respectively). Conclusions This study revealed that smoking cessation was associated with the physical component of HRQL. The smoking dependence in patients with COPD could explain this finding. Health care professionals should work harder on effective smoking cessation strategies. Key messages These findings suggested that HRQL was better among patients who did not quit smoking. Patients who did not cease smoking reported better physical status and poorer mental status in comparison with patients who quit smoking.