ABSTRACT
OBJECTIVE: To explore the detection of small airway dysfunction in occupational populations and its influencing factors. METHODS: A convenient sampling method was adopted, and 15 490 occupational health workers who were tested for pulmonary ventilation function in 2018 were selected as study subjects. The results of pulmonary ventilation function examination and chest direct digital radiography(DR) were collected and analyzed. RESULTS: Among the study subjects, 2 083 were detected to have abnormal pulmonary ventilation function, the abnormal detection rate was 13.4%; 3 089 subjects were detected to have small airway dysfunction, and the abnormal detection rate was 19.9%. The two-class logistic regression analysis results suggested that female, exposure to organic dusts during work, exposure to asthmogenic during work, chest DR abnormalities and abnormal pulmonary ventilation function were risk factors for abnormal small airway function(P<0.05). CONCLUSION: The abnormal small airway function in occupational populations is related to various factors such as gender and occupational exposure to allergens. The screening of small airway function in this group may help advance the prevention and treatment of respiratory diseases.
ABSTRACT
OBJECTIVE: To explore the 2014 edition of the diagnostic criteria of occupational noise-induced deafness on the assessment of hearing loss in occupational health examination. METHODS: A total of 835 noise-exposed workers were selected as study subjects by cluster sampling method. The hearing threshold results were compared through two different editions of criteria: GBZ 49-2007 Diagnostic Criteria of Occupational Noise-induced Deafness( GBZ 49-2007) and GBZ 49-2014 Diagnosis of Occupational Boise-induced Deafness( GBZ 49-2014). RESULTS: The binaural high frequency threshold average calculated by GBZ 49-2007 was lower than that of GBZ 49-2014 [( 46. 8 ± 8. 1) vs( 49. 2 ± 8. 0) d B,P < 0. 01].The speech frequency threshold average of the good ear calculated by GBZ 49-2007 was lower than the monaural threshold of weighted value of the good ear of GBZ 49-2014 [( 18. 8 ± 3. 6) vs( 22. 0 ± 3. 3),P < 0. 01]. The speech frequency threshold average of the good ear and the monaural threshold of weighted value of the good ear calculated after age and sex correction using GBZ 49-2007 were lower than that calculated by using GBZ 49-2014 [( 18. 8 ± 3. 6) vs( 19. 4 ± 3. 6),( 21. 5 ±3. 4) vs( 22.0 ±3.3),P <0.05]. The detection rate of suspected occupational noise-induced deafness GBZ 49-2014 was higher than that of GBZ 49-2007( 6. 35% vs 2. 87%,P < 0. 01). CONCLUSION: In occupational health examination,the diagnostic criteria of GBZ 49-2014 can diagnose patients as suspected occupational noise-induced deafness easier than that of GBZ 49-2007.
ABSTRACT
OBJECTIVE: To analyze the effect of noise exposure on the hearing ability at different frequency in workers.METHODS: A total of 2 411 workers in a mechanical plant in Guangzhou were chosen as the study subjects by using judgment sampling method. The pure tone audiometry threshold test was carried out to analyze the status of hearing loss at different frequencies and its relationship with the length of service of workers. RESULTS: Among the 2 411 workers,883 workers had different degrees of decreased hearing thresholds,the detection rate was 36. 6%. Among them,the single unilateral hearing loss accounted for 19. 6%( 472/2 411),and the binaural hearing loss was 17. 0%( 411/2 411). The hearing loss detection rate of left ear was higher than that of the right ear( P < 0. 05). The decreased threshold of left ear at 0. 5,3. 0 and 6. 0 kHz was higher than that of the right ear at the same frequencies( P < 0. 05). The decreased threshold in both the left and the right ear increased with the increase of the frequency( P < 0. 01). The decreased hearing threshold was the highest at the frequency of 6. 0 kHz. The auditory threshold of left ear in 0. 5,1. 0,2. 0,3. 0 and 6. 0 kHz were higher than that of right ear at the same frequencies( P < 0. 05). The detection rate of hearing loss increased with the increase of service length( P < 0. 01). The decreased threshold of 1. 0-6. 0 kHz increased with the increased length of service except for the frequency of 0. 5 kHz( P < 0. 05). CONCLUSION: There is a significant decreased threshold in workers exposed to noise frequency of 6. 0 kHz. The hearing ability of left ear is more easily impaired than the right ear.There is a dose-response relationship for the length of noise exposure and hearing loss.
ABSTRACT
OBJECTIVE: To investigate the prevalence of metabolic syndrome(MetS) and its related influencing factors among male workers in several industries in Guangzhou City.METHODS: A total of 2 987 male workers were selected by convenience sampling method and the occupational health physical exam data from 2012 to 2015 was collected.The MetS was diagnosed according to the diagnostic criteria proposed by the Chinese Medical Association Diabetes Association.The analysis of correlation factors was conducted by the generalized estimating equation method.RESULTS: The diastolic blood pressure of subjects increased year by year(P<0.01) and high-density lipoprotein cholesterol(HDL-C) decreased year by year(P<0.01) from 2012 to 2015,but the changes of body mass index,systolic blood pressure and levels of fasting plasma glucose,triglyceride didn't increase or decrease over time.The prevalence of high blood pressure,high glycemia,high TG,low HDL-C and MetS were found to increase year by year(P<0.01) from 2012 to 2015.The generalized estimating equation analysis results showed service length,family history(hypertension and/or diabetes),regular alcohol consumption,frequent smoking,oily diet and meat-rich diet were the risk factors of MetS(P<0.05) after adjusting the confounding factors of age.CONCLUSION: The incidence of MetS in male workers in Guangzhou City is increasing year by year.The service lengh,family history(hypertension and/or diabetes),regular alcohol consumption,regular smoking,oily diet and meat-rich diet are associated with the prevalence of MetS in this population.