OBJECTIVES To investigate the effects of tobacco smoking on serum vitamin B12, folic acid and haematological parameters in healthy Thai smokers and non-smokers. DESIGN Cross-sectional study of smokers and non-smokers in a military unit in Bangkok, Thailand. SETTING A military unit in Thailand. SUBJECTS One hundred and twenty-three male smokers from a military unit in Bangkok, who particip...

The purpose of this study was to assess the effects of smoking on periodontal tissues and halitosis. The study group consisted of 287 individuals. They received full mouth periodontal examinations and measurements of volatile sulfur compounds in mouth. The study group consisted of 76 non-smokers, 63 former smokers and 148 current smokers. The results showed that the mean clinical attachment lev...

Data from a five year follow up study on 4372 smokers and 3753 non-smokers were analysed to investigate the influence of the type of tobacco smoked and whether the subjects said they inhaled or not on the decline in forced expiratory volume in one second (FEV1). The study sample comprised 1492 smokers of plain cigarettes and 1936 smokers of filter cigarettes, 1711 smokers of cheroots or cigars,...