abstract   background : noise is the most common hazard in the workplace and noise induced hearing loss considered to be the most common occupational disease as well. cigarette smoking, in some studies, has been known to induce hearing loss. the purpose of this study was to evaluate the effect of contemporary exposure to occupational noise and cigarette smoking on hearing.   methods : 478 assem...

PURPOSE To study the effect of smoking on the prevalence of recurrent aphthous stomatitis (RAS) and to examine whether intensity and duration of smoking influence RAS lesions. SUBJECTS AND METHODS A cross-sectional survey was conducted on a random sample of 1000 students of The University of Jordan, Amman, between May and September 2008. Sociodemographic factors and details about smoking habi...

BACKGROUND The relationship between tobacco smoking, including secondhand smoking, and depression has been assessed. The purpose of this study was to evaluate the association between secondhand smoking among current, former and never smokers and depressive symptoms. For secondhand smoking, gender differences and sources of exposure were examined. METHODS Data from 34,693 participants from the...

This cross-sectional study investigated associations of cumulative smoking exposure and duration of smoking cessation with periodontitis and evaluated the effects of biological, behavioral, and social risk variables on these associations. The sample comprised 705 adults of both sexes (age, 35-65 years) who underwent a full-mouth periodontal examination. Subjects were classified according to smo...

Two studies were conducted to quantify biological and behavioral effects resulting from exposure to controlled doses of marijuana smoke. In one study, puff volume (30, 60 and 90 ml) and in a second study, breathhold duration (0, 10 and 20 sec) were systematically varied while holding constant other smoking topography parameters (number of puffs = 10, interpuff interval = 60 sec and inhalation v...

using a 40-odorant test, the odor identification ability of a large number of persons for whom complete smoking histories were available. As indicated herein, the results of this study reveal a clear adverse effect of cigarette smoking on olfactory function that is dose related and present in past smokers. This effect is reversible, at least to some degree, and the time course of this reversibi...

The objectives of this study were to evaluate the influence of cigarette smoking on gingival bleeding and serum concentrations of cotinine, haptoglobin, and alpha 1-antitrypsin in Malaysian smokers. A total of 197 male smokers and nonsmokers were recruited for this study. Plaque index, bleeding on probing (BOP), and levels of serum cotinine, haptoglobin, and alpha 1-antitrypsin were evaluated. ...

The risk of colorectal cancer associated with smoking is unclear and may be influenced by genetic variation in enzymes that metabolize cigarette carcinogens. The authors examined the colorectal cancer risk associated with smoking and 26 variants in carcinogen metabolism genes in 1,174 colorectal cancer cases and 1,293 population-based controls recruited in Canada by the Ontario Familial Colorec...

BACKGROUND Young age at onset of smoking is a known risk factor for cancer; however, few studies have investigated the risk of cancer associated with onset of smoking during adolescence in Japan. METHODS We analyzed a portion of the data from a population-based cohort of 40 897 subjects aged 40 to 69 years with a history of smoking and no history of cancer at baseline. RESULTS During a 14-y...

background: numerous studies have assessed risk factors for multiple sclerosis (ms), but regarded to paradoxical results & specific ethnical- cultural circumstances in ahvaz, as a city in iran, this case-control study was aimed to assess some factors related to lifestyle (consumption & exposure with cigarette smoking, duration & surface of sun light exposure, exposure to pets and farm animals) ...