Silicosis and industrial bronchitis by exposure to silica powders and cement.

Objective: to identify the association between the exposure of workers to inorganic dust in a quarry and a cement factory and pulmonary diseases.

Methods: a transverse study on data from 32 quarry workers (QWs) and 57 cement production line workers (CFWs) to inorganic-dust exposure was performed. Pulmonary function tests and chest X ray were done in both groups.

[Laboral talc pneumoconiosis as a low frequency disease].

Objective: To identify the association between exposition to talcum powder and talcosilicosis in a cosmetic factory.

Methods: A descriptive and prospective survey including 24 workers from the bottling and grinding areas was performed. All patients had chest roentgenography.

Pleural mesothelioma in paraoccupational, environmental and occupational patients exposed to asbestos.

Objective: To identify the characteristics of pleural mesothelioma in patients exposed to asbestos.

Methods: A transverse study in 3700 cases of lung cancer was conducted. There were identified 21 cases with mesothelioma.

[The influence of preventive programs on laboral injuries].

Objective: To evaluate the impact of preventive programs at enterprises affiliated to the Instituto Mexicano del Seguro Social (IMSS) during 2004.

Methods: Transversal study in 987 enterprises.

Variables: labor injuries (LI) of temporal disability, permanent disability and death.

[Pneumoconiosis in affiliated workers have irreversible sequelae].

Objective: to analyze the frequency and importance of pneumoconiosis in affiliated workers to Instituto Mexicano del Seguro Social.

Material And Methods: it was carried out a transverse, observational and comparative study; the behavior of the qualified pneumoconiosis was revised 1994-2004. The analyzed variables were sex, age, occupation, permanent disability and economic activity.

[Industrial bronchitis in workers exposed to hydroalcohol].

Objective: To identify the association between industrial bronchitis and exposure to hydroalcohol.

Methods: In a prospective study, 80 workers exposed to hydroalcohol answered a standardized questionnaire and had two spirometry tests based on the American Thorax Society (ATS) criteria, to evaluate functional capacity and predominant spirometric patterns. The test included the parameters: forced vital capacity (FVC), forced expiratory volume in one second (FEV1), the ratio FEV1/FVC, the peak expiratory flow (PEF), the forced expiratory flow 25-50 (FEF50) and the forced expiratory flow 25-75% (FEF 25%-75%).

Workplace accident-related finger-fracture at the Mexican Institute of Social Security. Resolution time, economic impact and sequelae.

Objective: To identify resolution time and economic impact of occupational finger fracture with permanent disability.

Methods: A cross-sectional study was conducted in 2004; the main variables were age; sex; disability days and sequelae. The International Classification of Diseases (ICD 10) was used for the study.

[Reliability and validity of a generic job exposure matrix applied on a small-business].

Objective: to evaluate the reliability and validity of a generic job exposure matrix (JEM) applied in a small business.

Methodology: procedures to evaluate a JEM integrated by six sections: the number of exposed workers per area, frequency of exposure, time of exposure time, level of exposure, safety controls, and proximity to source of exposure, was evaluated. The JEM also obtains information about possible health effects from exposure to occupational/environment agents.

Comparison of a technique using a new percutaneous osteosynthesis device with conventional open surgery for displaced patella fractures in a randomized controlled trial.

Objective: To compare the percutaneous patellar osteosynthesis system (PPOS) technique with open surgery for patella fractures.

Design: Randomized controlled trial.

Setting: Referral orthopedic and trauma center.

[Malingering among workers seeking disability insurance].

Objective: Describe the frequency and characteristics of Mexican Social Security workers with malingering disorder that request disability pension.

Material And Methods: Comparative survey made among 136 workers seen during 2001, which were divided into three groups: malingering workers (MW), workers without disability (WOD), and workers with disability (WWD). We administered the Z Test for scaled variables and Z2 Test for nominal variables to identify group differences

Results: The incidence ofmalingering was of 2.

Burnout syndrome among Mexican hospital nursery staff.

Objective: To identify frequency and related factors to burnout syndrome in the nursing staff at a specialty hospital in the Mexican state of Guanajuato.

Materials And Methods: A prolective, analytical cross-sectional study was carried out. In 236 randomly selected nurses, a 35-item questionnaire proposed by Cyberia Shink was applied in a blind survey.

[Risk factors associated with work-related accidents in the construction industry in the Valley of Mexico].

Objective: Our aim was to describe construction-industry, work-related accident prevalence in, associated factors in, and potential impact on affiliated workers of the Mexican Institute of Social Security (Instituto Mexicano del Seguro Social, IMSS) in the Valley of Mexico.

Materials And Methods: Prevalent cases in a retrospective case-control design.

Cases: These include 385 construction-industry workers who were found to have construction work-related accidents in 2001.

[Potential under-registration of occupational accidents in the Mexican Institute of Social Security].

Objective: To assess the potential under-registration of work-related accidents in the Mexican Institute of Social Security.

Material And Methods: A countrywide cross-sectional study was carried out with information collected from 27 district offices of the Mexican Institute of Social Security (MISS), on workers seen at MISS emergency rooms during November 2001 because of a probable accident at work. We compared these reports to official records of work-related accidents to estimate the proportion of incomplete reports.

Disabling spondyloarthrosis risk factors in valley of Mexico workers.

Background: The objective of this study was to describe the most prevalent physically disabling conditions for insured workers belonging to the Mexican Social Security Institute (IMSS) in the Valley of Mexico and to identify risk factors for disabling spondyloarthrosis.

Methods: Retrospective cases and prevalent controls from IMSS clinics in the Mexico City metropolitan area were studied. Eighty cases were IMSS workers reporting disability due to spondyloarthrosis; 80 controls were active workers at the same workplace and shared the economic activity of the cases.

Effects of grapefruit juice and smoking on verapamil concentrations in steady state.

Objective: Human gut wall cytochrome P(450) (CYP)3A4 is inhibited by grapefruit juice (G), whereas smoking increases CYP1A2 activity. Both enzymes contribute to verapamil biotransformation. This study was performed to quantitatively assess the effect of these factors on verapamil pharmacokinetics in steady state.