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    CHRONIC RESPIRATORY SYMPTOMS AND SPIROMETRIC PARAMETERS AMONG PROFESSIONAL DRIVERS - THE IMPACT OF OCCUPATIONAL EXPOSURE AND WORK TENURE
    (Faculty of Medicine, Ss. Cyril and Methodius University in Skopje, 2026-06-18)
    Andonov, Goran
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    Aim. To assess the prevalence of chronic respiratory symptoms, spirometric parameters and the effects of occupational exposure among professional drivers. Material and methods. A cross-sectional epidemiological study was conducted including 70 male professional drivers and 70 administrative staff matched by age, work tenure, occupational exposure and smoking status. Data on respiratory symptoms, smoking status, occupational exposure to harmful agents and work tenure were collected using a standardized questionnaire. Spirometry was performed to assess lung function. Results. Professional drivers had a significantly higher prevalence of respiratory symptoms compared to controls, including any respiratory symptom (81.4% vs. 58.6%, p=0.003), nasal symptoms (35.7% vs. 8.6%, p<0.001), cough (61.4% vs 34.3%, p=0.002), cough with phlegm (37.1% vs. 20.0%, p=0.040), dyspnea (31.4% vs. 17.1%, p=0.049) and wheezing (25.7% vs. 7.1%, p=0.006). All spirometric parameters were significantly lower in drivers, indicating involvement of both large and small airways (p<0.05). Drivers with ≥ 20 years of work tenure exhibited a significantly higher prevalence of symptoms and lower spirometric values. Multivariable logistic regression identified exposure to gases as the strongest independent predictor of respiratory symptoms (adjusted OR up to 12.4, p<0.01), followed by exposure to smoke (adjusted OR up to 6.31, p<0.05). Dust exposure showed a non-significant trend, while vapors were not associated with respiratory symptoms. Conclusion. Professional drivers are at increased risk of developing respiratory symptoms and lung function impairment compared to the control group. Occupational exposure to gases and smoke represents the main independent risk factor, while longer work tenure suggests a cumulative adverse effect.
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    Lung Function Impairment in Construction Workers – Influence of Smoking and Exposure Duration
    (Scientific Foundation SPIROSKI, 2021-05-08)
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    Bislimovska, Dragana
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    Atanasovska, Aneta
    AIM: The objective of the study was to assess the influence of exposure duration and smoking on ventilatory impairment among construction workers. METHODS: A cross-sectional study was performed, including 83 construction workers aged 18–64 years, compared to equivalent number of office controls matched by age, workplace exposure duration, and smoking status. Data on chronic respiratory symptoms, work history, and smoking status were collected by standardized questionnaire, while lung functional testing of the examined subjects was performed by spirometry. RESULTS: Mean values of spirometric parameters were lower in construction workers compared to controls with statistical significance registered for maximal expiratory flow (MEF25), MEF50, and MEF75. Lung functions of construction workers have been found to decrease in relation to exposure duration but reached significance only for small airways changes. There was a significant difference in detected ventilatory impairment between exposed workers and controls for any type of ventilatory impairment, as well as obstructive and combined ventilatory pattern and obstructive ventilatory pattern in small airways. Obstructive ventilatory impairment was significantly associated with life-time smoking in construction workers, while obstructive ventilatory pattern in small airways was significantly associated with life-time smoking. The combined effect of daily smoking, life-time smoking, and number of cigarettes smoked daily was shown to have a significant influence in their development. The risk for obstructive ventilatory pattern in small airways among exposed subjects was about 4 fold higher in those exposed more than 20 years (odds ratio [OR] = 3.68 [1.01–14.59] confidence interval [CI] 95%), and about 2.5 fold higher in smokers (OR = 2.57 [0.92-7.25] CI 95%). Exposure duration, smoking and age had independent effect only on small airways changes and force expiratory volume in the 1st s/force vital capacity %. CONCLUSION: Our data suggest the importance of the joint effect of job exposure in construction and daily smoking on the development of lung function impairment and airflow limitation, being dominant, especially on small airways.