Passive smokers reported more respiratory symptoms than nonsmokers. Specifically, passive smokers were significantly (p<0.001) more likely than nonsmokers to report chronic cough symptoms, chronic phlegm symptoms, shortness of breath and chest illnesses (Table 2). buy cipro
Several methods were used to minimize bias in this study. First, CO levels were measured to assess whether the self-reported passive smokers actually experienced more smoke at the work place than nonsmokers. Measures on the paired subjects were gathered on the same day or on consecutive days to eliminate diurnal or seasonal variations.
Second, candidates who were ex-smokers, who had ever lived in a home where smoking was permitted or who had health, environmental or occupational conditions that could affect pulmonary function adversely were not included in the study.
Third, all tests and evaluations were administered identically to all subjects by the same technician. The technician did not disclose the study hypothesis.
Table 2—Proportions and Significance of Differences between Passive Smokers and Nonsmokers Who Experienced Chronic Respiratory Symptoms