Statistical analysis Categorical data are expressed as frequencies and percentages, and continuous data as mean and standard deviation (SD), or median and interquartile range (IQR: 25th75th percentile)
Because these devices detect particles by light scattering, dense vapour clouds can interfere with the light beam similarly to smoke, especially if you exhale directly toward the detector or vape in a confined space with poor ventilation
Signs include white macules, papules and plaques
Besides, they offer added advantages like weight management and reduced risk of hypoglycaemia
20 cigarettes per pack , whether native or non-native
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