الفهرس 
OCCUPATIONAL ASTHMAOnly 14 pages are availabe for public view
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Abstract
This study was conducted at El-Mahalla Chest Hospital
on 115 subjects (100 workers exposed to cotton dust from Misr
Company for Spinning and Weaving and 15 healthy subject not
exposed to cotton dust) in the period from July 2013 to
February 2014.
The study protocol was approved by ethical committee
Faculty of Medicine, Ain Shams University.
These subjects were classified in to 5 groups:-
Group I: 15 healthy subjects not exposed to cotton dust
(control group).
Group II: 25 workers works at weaving.
Group III: 25 workers works at spinning.
Group IV: 25 workers works at opening of cotton bales.
Group V: 25 workers works at carding.
Exclusion criteria:-
1- Previous exposure to other occupational dust such as Silica,
Coal dust.
2- Those with history of smoking.
3- Those with previous history of asthma or COPD before
Joining to the work.Patients were subjected to the following:-
1. Full history taken.
2. A standardized questionnaire was patterned according to
American Thoracic Society (ATS) questionnaire (Ferris,
1978). Questionnaire collected information on complete
work history, respiratory symptoms such as (cough,
expectoration (sputum), wheezing, dyspnea, grade of
chest tightness), and smoking history.
3. Physical measurements: Including weight, and height of
each subject and BMI.
4. Clinical examination of chest.
5. Plain chest X ray (postero-anterior) view.
6. Spirometric pulmonary functions test was performed
using ”CHEST GRAPH H I - 105- Japan” apparatus
which measure: (FEVI%, FVC%, FVC/FEV1%, PEFR%
and MMEF %).
The present work revealed that:-
• There was a highly significant statistical difference on
comparing presence of respiratory symptoms between
control group and cotton exposed groups.
• There was significant statistical difference on comparing the
presence of respiratory symptoms between control group
and weaving, spinning, opening of cotton bales and carding
groups.• Respiratory symptom was the highest prevalent in spinning
and weaving workers.
• Cough, expectoration and chest tightness were the highest
prevalent symptoms in cotton exposed groups.
• Cough, expectoration were the highest prevalent in spinning
and weaving workers.
• There was significant statistical difference on comparing
FEVI% between control group and cotton exposed groups.
• There was significant statistical difference on comparing
FVC% between control group and cotton exposed groups.
• There was significant statistical difference on comparing
FVC/FEV1% between control group and cotton exposed
groups.
• There was significant statistical difference on comparing
PEFR % between control group and cotton exposed groups.
• There was no significant statistical difference on comparing
MMEF% between control group and cotton exposed groups.
• There was positive correlation between presence of
respiratory symptoms and duration of exposure to cotton
dust, the longer the duration of exposure to cotton dust the
higher the presence of respiratory symptoms.
• There was no correlation between period of exposure to
cotton dust and spirometric functions.