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Effects of earplugs on catecholamine and cortisol excretion in noise-exposed textile workers. 1996

A Sudo, and A L Nguyen, and H Jonai, and S Matsuda, and M B Villanueva, and M Sotoyama, and T C Nguyen, and V T Le, and M H Hoang, and D T Nguyen, and S Nguyen
National Institute of Industrial Health, Kawasaki, Japan.

To investigate physiological and psychological effects of industrial noise, a survey was performed on 50 female workers exposed to machinery noise [93-100 dB(A)] (noise group) and 25 female workers in less-noisy environments [71-75 dB(A)] (control group) in a textile factory in Vietnam. Urine was collected for analysis of catecholamines and cortisol. The subjects were also asked to fill out a questionnaire. Each subject was examined over 2 working days. The workers in the noise group were asked to put earplugs in their ears during the working hours of the 2nd day. On the 1st day without earplugs, urinary excretion of catecholamines in the noise group were greater than those in the control group. Cortisol in urine showed a similar tendency. Differences in catecholamine excretion between the noise group and the control group decreased on the 2nd day when the earplugs were used for attenuation of noise level in the noise group. Frequency of subjective fatigue symptoms was lower on the 2nd day than that on the 1st day in noise group, while the control group showed almost no day-difference. The results indicate that the catecholamine response to noise in workers was reduced through the use of earplugs.

UI MeSH Term Description Entries
D009623 Noise, Occupational Noise present in occupational, industrial, and factory situations. Occupational Noise,Noises, Occupational,Occupational Noises
D002395 Catecholamines A general class of ortho-dihydroxyphenylalkylamines derived from TYROSINE. Catecholamine,Sympathin,Sympathins
D004430 Ear Protective Devices Personal devices for protection of the ears from loud or high intensity noise, water, or cold. These include earmuffs and earplugs. Earplugs,Hearing Protective Devices,Earmuffs,Device, Ear Protective,Device, Hearing Protective,Devices, Ear Protective,Devices, Hearing Protective,Ear Protective Device,Earmuff,Earplug,Hearing Protective Device,Protective Device, Ear,Protective Device, Hearing,Protective Devices, Ear,Protective Devices, Hearing
D005221 Fatigue The state of weariness following a period of exertion, mental or physical, characterized by a decreased capacity for work and reduced efficiency to respond to stimuli. Lassitude
D005260 Female Females
D006339 Heart Rate The number of times the HEART VENTRICLES contract per unit of time, usually per minute. Cardiac Rate,Chronotropism, Cardiac,Heart Rate Control,Heartbeat,Pulse Rate,Cardiac Chronotropy,Cardiac Chronotropism,Cardiac Rates,Chronotropy, Cardiac,Control, Heart Rate,Heart Rates,Heartbeats,Pulse Rates,Rate Control, Heart,Rate, Cardiac,Rate, Heart,Rate, Pulse
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D006854 Hydrocortisone The main glucocorticoid secreted by the ADRENAL CORTEX. Its synthetic counterpart is used, either as an injection or topically, in the treatment of inflammation, allergy, collagen diseases, asthma, adrenocortical deficiency, shock, and some neoplastic conditions. Cortef,Cortisol,Pregn-4-ene-3,20-dione, 11,17,21-trihydroxy-, (11beta)-,11-Epicortisol,Cortifair,Cortril,Epicortisol,Hydrocortisone, (11 alpha)-Isomer,Hydrocortisone, (9 beta,10 alpha,11 alpha)-Isomer,11 Epicortisol
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D013784 Textiles Filament or fiber, or the materials generated from them by weaving, embroidery, knitting, crocheting, tufting, or felting such as yarn, thread, cording, rope, netting, lace, or sheets of cloth or fabric. Textile

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