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chronic bronchitis
Epidemiological study of chronic bronchitis with special reference to effect of air pollution
      
From 1962 to 1969 an investigation on chronic bronchitis was conducted to clarify the chronic influence of air pollution to human health in 9 areas selected from Osaka and Hyogo prefectures showing different degrees of air pollution.
      
A higher prevalence of persistent cough (17.6%), persistent phlegm (13.7%), chronic bronchitis (9.8%) and nasal catarrh (19.6%) was found in sisal workers than in controls (5.9, 5.9, 5.9 and 0%, respectively).
      
The illness showed no unusual features and the clinical condition of the personnel exposed could be attributed neither to byssinosis nor to chronic bronchitis.
      
The acute influence of NO2 in MAC value concentrations upon the pulmonary function was studied in 55 healthy male subjects (18-65 years old) and 84 male patients suffering from chronic bronchitis (30-72 years old).
      
Respiratory symptoms, chronic bronchitis, and ventilatory function in shipyard welders
      
Chronic cough (22%), chronic bronchitis (20%), dyspnea (20%) and wheezing (16%) were more frequent among welders; the difference was significant for the last 2 symptoms only.
      
Chronic bronchitis was diagnosed in 29 investigated patients.
      
The prevalence of chronic bronchitis ranged between 29 to 47% in all groups.
      
reported in the initial survey and 5 years later) to dusts doubled the odds for the appearance of chronic phlegm and attacks of breathlessness in all men, and of chronic bronchitis in men aged 41 to 50, initially free of the symptom.
      
In women, this exposure doubled the odds for new chronic cough and for chronic bronchitis.
      
Prolonged exposure to chemicals doubled the incidence rates of attacks of breathlessness and dyspnea in all women and of chronic bronchitis in women with the lowest level of education.
      
The prevalence of chronic bronchitis was found to be higher among the control population as compared with the exposed group (6.7% vs 2.6%).
      
It therefore appeared that agate dust had no role in precipitating chronic bronchitis.
      
Six subjects with chronic bronchitis displayed significantly (P>amp;lt;0.05) higher VTG (before metacholine) and TLCO, than those without this ailment.
      
The highest prevalence of chronic respiratory symptoms in exposed workers was found for chronic cough (49.1 %), followed by dyspnea (43.9%), rhinitis (38.6%), chronic phlegm (31.6%), and chronic bronchitis (26.3%).
      
Compared to the control subjects, the IA teachers had more complaints in respect of the skin, eyes, nose, throat, and lower airways -including chronic bronchitis (OR 12.4, 95% confidence interval 2.95-110.5).
      
A suspected interaction between smoking and work environment was noted for some symptoms, especially impaired smell and chronic bronchitis.
      
There was a significantly higher prevalence of chronic bronchitis (25.0%) and sinusitis (38.9%) in mail carriers than in control workers (13.8%; P?>amp;lt;?0.05 and 2.3%; P?>amp;lt;?0.01).
      
The Commission relied heavily upon a re-analysis of data from the Deutsche Forschungsgemeinschaft (DFG) Chronic Bronchitis study (1965-1977).
      
 

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