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Low Back Pain among nurses: Prevalence, and Occupational Risk Factors

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Occupational Diseases and Environmental Medicine 2017年第1期5卷 26-37页

作者： Wided Boughattas Olfa El Maalel Maher Maoua Iheb Bougmiza Houda Kalboussi Aicha Brahem Souhaiel Chatti Fethi Mahjoub n.jib mrizak Department of Occupational Medicine Faculty of Medicine Ibn El Jazzar Sousse Tunisia Department of Community Health Faculty of Medicine Ibn El Jazzar Sousse Tunisia

Objectives: Low back pain is a major occupational problem especially among nursing staff. The objectives of our study are to evaluate the prevalence of low back pain among nurses and to look for physical and psychosocial risk factors. Methods: It is a cross-sectional study based on a self-administered questionnaire destined for all nurses working in Farhat Hached Teaching hospital of Sousse (Tunisia). Results: Our study included 203 nurses with an average age of 39.8 years. The prevalence of low back pain over the last twelve months was 58.1%. The factors that are significantly associated to low back pain were: high BMI, number of pregnancies, arthritis, poor physical condition, daily frequency of inappropriate posture for the activity being performed, and the layout of materials in the workplace. Conclusion: Our study evidenced the high prevalence of LBP among nurses and allowed bringing to light the role of individual and ergonomic physical factors in the genesis of LBP. Such identification permits to undertake targeted preventive actions. The association between psychosocial factors and LBP was not emphasized.

关键词： Low Back Pain Prevalence nurses Physical Factors Psychosocial Factors

Occupational Allergic Contact Dermatitis in Tunisia: Epidemiology and Occupational Outcome

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Occupational Diseases and Environmental Medicine 2018年第3期6卷 107-117页

作者： Asma Aloui Maher Maoua Houda Kalboussi Imène Kacem Sana El Guedri Aicha Brahem Olfa El Maalel Faten Debbabi Souhaiel Chatti n.jib mrizak Department of Occupational Medicine Faculty of Medicine of Sousse University of Sousse Farhat Hached Teaching Hospital Sousse Tunisia

Background: Occupational allergic contact dermatitis (ACD) is one of the most frequent diseases on the workplace worldwide. Its national incidence and prevalence were not previously studied in Tunisia. Objective: To assess incidence of occupational allergic contact dermatitis and its occupational outcome in Tunisia. Methods: Descriptive epidemiological study of all cases of occupational allergic contact dermatitis reported from 2002 to 2012 in Tunisia and recognized by the medical commissions of the national Health Insurance Fund. Results: 315 cases of occupational ACD were collected representing an annual incidence of 31.65 cases/100.000 workers in the private sector in Tunisia. The mean age of our population was 42.70 ± 9.02 years with a male predominance (sex ratio 3.03). The most affected sectors were the clothing sector (14.3% of cases) and the cement industry (13.7% of cases). Patch tests were positive in 188 patients (59.67%). The most frequently positive allergen was potassium dichromate in 27.3% of the cases. Overall, 25.4% of patients had lost their jobs. After multiple binary logistic regression, job loss had a statistically significant relationship with localization of lesions on the face and on dominant hand. Conclusion: Occupational ACD is frequent in Tunisia and is responsible for an important rate of job loss. Preventive measures must be reinforced, especially the wearing of protective gloves.

关键词： Epidemiology Occupational Disease Allergic Contact Dermatitis Job Loss Tunisia

REPRESEnTATIOn OF GEnERALIZED TRAnSLATIOnS OF THE PRODUCT OF TWO FUnCTIOnS On SIGnED HYPERGROUPS On THE REAL LInE

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Analysis in Theory and Applications 2012年第3期28卷 201-223页

作者： n.jib Ben Salem nabila Hamda Université de Tunis El Manar

In this paper, we consider the generalized translations associated with the Dunkl and the Jacobi-Dunkl differential-difference operators on the real line which provide the structure of signed hrpergroups on R. Especially, we study the representation of the gener- alized translations of the product of two functions for these signed hypergroups.

关键词： Bessel function Dunkl operator generalized translation signed hypergroup,Jacobi-Dunkl operator Jacobi function

Epidemiology of Occupational Asthma in Tunisia: Results of a First national Study

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Occupational Diseases and Environmental Medicine 2016年第2期4卷 27-36页

作者： Maoua Maher El Maalel Olfa Boughattas Wided Chatti Souhail Gharbi Ezzeddine Kammoun Houda Kalboussi Houda Mlaouah Jabrane Abbassi Ammar Brahem Aicha Loukil Mouna Haj Salah Habib Ben Khdimallah Khaled Masmoudi Tasnim Benzarti Mohamed Debbabi Faten mrizak n.jib Occupational Medicine and Professional Pathologies Department Faculty of Medicine of Sousse Sousse Tunisia University of Sousse Sousse Tunisia CnAM Regional Centers of Sousse Tunis and Sfax Tunisia English Department Faculty of Medicine of Sousse Sousse Tunisia Forensic Medicine Department Faculty of Medicine of Sousse Sousse Tunisia Department of Pneumology and Allergology Farhat Hached Teaching Hospital Sousse Tunisia

Introduction: Apart from its increasingly important frequency, occupational asthma (OA) has become the most important cause of occupational respiratory disorders in developed countries. The number of etiological agents continues to grow following the constant introduction of new harmful substances in industry. Objectives: Determine the prevalence and incidence of OA in our country, the socio-occupational characteristics of asthmatics, and study the forensic and social impact of such pathology. Material and Methods: An exhaustive retrospective epidemiological study was conducted in Tunisia about charts of occupational asthma cases recognized by the competent commissions of the national Medical Care Fund (CnAM) during the period ranging from January 1st 2000 to December 31st 2008. Results: 361 occupational asthma cases, accounting for a prevalence of 7.17% of all occupational diseases, were recognized during the period of the study. Occupational asthma annual incidence was estimated to be 24.42 cases per 1000000 workers. Our study population was mainly women with a sex ratio of 0.86. More than a half (57.6%) of recognized OA cases were working in the textile industry sector. Concerning the asthmatics’ professional career, most of recognized OA cases (n = 225 i.e. 70.6% of cases) kept their jobs, whereas 58 patients did not. The professional career was linked to gender with a job loss that is 1.79 time more important in asthmatic women. Conclusion: The incidence of occupational asthma in Tunisia is comparable with that found in other Mediterranean countries. A rigorous and adequate prevention is necessary and allows reducing the importance of this occupational pathology and its serious consequences.

关键词： Epidemiology Occupational Asthma Pneumology Allergology Tunisia

Extraprofessional and Occupational Risk Factors for Colorectal Cancer

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Journal of Life Sciences 2012年第8期6卷 848-857页

作者： Olfa El Maalel Wided Boughattas Maher Maoua Houda Kalboussi Iheb Bougmiza Houssem Rhif Souhaiel Chatti Kader n'Daye Faten Debbabi Ali Mtiraoui noejib mrizak Department of Occupational Medicine Teaching Hospital Farhat Hached of Sousse Avenue Ibn El Jazzar 4000 Tunisia Department of Communal Medicine Medicine University Avenue Mohamed Karoui Sousse 4002 Tunisia

Colorectal cancers （CRC） account for frequent and serious cancers which result from the interaction between individual genetic factors and environmental factors, and in particular widely studied nutritional ones. The role of other occupational factors remains a controversial subject. The objective of this study is to evaluate the possible impact of occupational factors on the risk of developing CRC. Materials and Methods： This is a retrospective case-control study. The cases and the control group were enlisted in the general surgical ward of Farhat Hached Teaching Hospital of Sousse （Tunisia） during the period extending from 2004 to 2008, and they were age and gender-matched. The data were analyzed using SPSS 11.0 software with a signification threshold fixed at 5%. A univariate analysis was carried out as well as a multiple binary logistical regression. Results： During the period of the study, 40 cases of colorectal cancers have been colligated including 28 men and 12 women with a sex ratio of 0.43. The average age of the cases was 61.55 ± 13.3 years and 60.40 ± 12.84 years for the control group, with a non significant difference （P = 0.69）. The univariate analysis has objectivized significant associations between colorectal cancer and the housing conditions, the neoplastic and digestive family history, the occupational activity sector, exposure to pesticides, and lack of periodic medical supervision. After logistical regression, the occurrence risk of CRC was significantly associated with： alcohol and smoking （ORa = 3.43; Pa = 0.05）, meat consumption （ORa = 3.34; Pa = 0.03）, exposure to pesticides （ORa = 20.44; Pa = 0.012） and lack of periodic medical supervision （OR = 7.45; P = 0.004）. Conclusion： The occupational risk factors might play a role in the etiopathogenesis of colorectal cancers. With regard to our study, pesticides seem to be most implicated and necessitate suitable preventive measures. nevertheless, it seems useful to multiply the studies to a much l

关键词： Colorectal cancer occupational risk factors extraprofessional factors epidemiology.

Mycosis Fungoides in Relation to Environmental and Occupational Exposures: A Case-Control Study in the Tunisian Center

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International Journal of Clinical Medicine 2018年第6期9卷 528-539页

作者： I. Kacem M. Hafsia L. Bousoffara n. Ghariani Fetoui O. El Maalel W. Boughattas n. Ghariani M. Denguezli A. Brahem S. El Guedri H. Kalboussi S. Chatti n. mrizak Occupational Medicine Department Teaching Hospital Farhat Hached Sousse Tunisia Dermatology Department Teaching Hospital Farhat Hached Sousse Tunisia

Introduction: The mycosis fungoides (MF) is the most common cutaneous T-cell lymphomas representing about 50% of all cutaneous lymphomas. Its pathogenesis remains poorly understood. Thus, its rising incidence rates call for an explanation. Several environmental and occupational factors have been implicated in the pathogenesis of this disease. Objective: To determine the potential occupational factors correlated in the occurrence of MF. Methods: Case-control study was carried out at the teaching Hospital Farhat Hached of Sousse (Tunisia) to investigate associations of MF and occupational risk factors. A questionnaire on lifetime job history was administered to 24 cases and controls. Cases were patients with MF and whose diagnosis was suspected by a dermatologist and confirmed by pathological examination. Controls were patients consulting in the occupational medicine department and matched to cases by age and gender. Bivariate analysis was used to calculate odds ratios (OR) and 95% confidence intervals (CI). Results: The average age of onset of the disease was 55.41 ± 17.4 years with a sex ratio of 2.42. We found an increased risk of MF associated with tobacco consumption higher than 40 Pack-year (OR = 6.6;95% CI = 1.22 to 35.4), exercise in the textile sector (OR = 9.4;CI = 1.06 to 84.3) and exposure to diesel exhaust (OR = 9.47;95% CI = 1.06 to 84.3). Conclusion: Occupational factors could play a role in the pathogenesis of MF. Regarding our study, smoking, working in the textile industry and exposure to diesel exhaust appear to be involved in the pathogenesis of MF. Further investigation is needed to confirm these findings.

关键词： Mycosis Fungoides Occupational Factors Tobacco Textile Sector Diesel Exhaust

Parental Occupational Exposure and Risk of Acute Leukemia in Children: A Tunisian Population-Based Case-Control Study

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International Journal of Clinical Medicine 2016年第3期7卷 193-203页

作者： H. Kalboussi Y. Ben Youssef I. Bougmiza F. Aloui A. Aloui W. Boughattas M. Maoua A. Brahem S. Chatti O. El Maalel F. Debbabi A. Khlif n. mrizak Occupational Medicine and Occupational Pathologies Department Farhat Hached Teaching Hospital Sousse Tunisia Hematology Department Farhat Hached Teaching Hospital Sousse Tunisia Community Medicine Department Faculty of Medicine of Sousse University of Sousse Sousse Tunisia

Background: In recent decades, the incidence of children’s hematological malignancies has been increasing worldwide including Tunisia. Their severity is reflected in the importance of the medical, social and economic impact. This increase remains fully unexplained, and the involvement of genetic, environmental and occupational factors is strongly suspected. Materials and methods: Our study was a cross-sectional survey of the type case-control conducted in the University Hospital of Farhat Hached of Sousse during the period ranging between 1 July 2011 and 30 June 2012, and which included children with acute leukemia compared to children unharmed by neoplastic disease. Cases and controls were matched by age and gender. Our objective was to describe the socio-occupational characteristics of the parents of children with acute leukemia and to identify potential occupational factors implicated in the genesis of acute leukemia. Results: The number of acute leukemia cases in the Hematology Service and day hospital of the University Hospital of Farhat Hached during the study period was 66 cases divided into in 40 boys and 26 girls with a sex ratio of 1.53. Our cases and controls were matched by age and gender. The risk of incidence of leukemia in children from smoking fathers was higher (p = 0.02, OR = 2.24, IC = [1.11 - 4.52]). The risk of incidence of leukemia in children from alcoholic fathers was higher with p = 0.009, OR = 3.9;CI = [1.33 - 11.39]. After adjusting different variables, the difference persisted significantly with pa = 0.03 and ORa = 3.5, ICa = [1.09 - 11.6]. 25.7% of cases had a family history of blood disease and neoplasia, whereas no control presented that. The difference was statistically significant (p = 0.006, OR = 1.46, IC = [1.38 - 1.56]). The parental occupational exposures associated to the occurrence of acute leukemia in children were pesticides with a statistically significant difference (p = 0.03, OR = 2.94, IC = [1.06 - 8.13]). This difference

关键词： Occupational Medicine Hematology Leukemia Children Case Control Survey

MBE和MOCVD生长的AIGaAs/GaAs GRIn—SCH SQW激光器深中心的比较

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物理学报 1995年第8期44卷 1249-1255页

作者：卢励吾周洁封松林徐俊英杨辉半导体超晶格国家重点实验室集成光电子学联合实验室半导体研究所实验区国家光电子工艺中心中国科学院半导体研究所北京100083

应用深能级瞬态谱(DLTS)技术详细研究分子束外延(MBE)和金属有机物化学汽相淀积(MOCVD)生长的AlGaAs/GaAs graded index sparate confinement beterostruc-ture single quantum well(GRIn-SCH SQW)激光器的深中心.结果表明,在激光器的n-ALGaAs层里除众所周知的DX中心外,还存在着较大浓度和俘获截面的深(电子或空穴) 陷阱,它们直接影响着激光器的性能.其中MBE生长的激光器里的深空穴陷阱H1可能分布在x_(A1)=0.22→0.43和x+(A1)=0.43的n-AlGaAs层里x_(A1)值不连续的界面附近,而深电子陷阱E3则可能分布在x_(A1)=0.43的n-AlGaAs层里x_(A1)值不连续的界面附近.MOCVD生长的激光器量子阱的AlGaAs层存在着DX中心和深电子陷阱.其中深电子陷阱E3可能分布在x_(A1)=0.22→0.30和x_(A1)=0.30的n-AlGaAs层里,而DX中心则分布在x_(A1)(x_(A1)=0.22→0.30和x_(A1)=0.30)值不连续的n-AlGaAs层界面附近.

关键词：电性质激光器 AlGaAs 深中心 MBE MOCVD