Objective The purpose of this study was identify the determinants of fatigue. Methods A cross-sectional study in 153 medic residents’ volunteers from diverse specialties at a high specialty medical unit of the Mexican Institute of Social Security was conducted. Sociodemographic and job information were collected. The presence of stress, burnout, depression and fatigue were assessed, as well as unfavorable psychosocial factors, violence and quality of working life at risk. The model of fatigue stress determinants was adopted and a multiple logistic regression model for that purpose was completed. Results 27% (153) took part. 61.4% referred depression and 50.3% mentioned loss interest for daily activities. From 28 to 74% pointed adverse psychosocial factors at work; 93.5% reported presence of violence. Of 8.5 to 89% had working life with poor conditions; 61.4% had stress, 63.4% fatigue, and 32.7% burnout syndrome. In multiple logistic regression model, stress, OR: 8.9 (95% CI: 3.4–23.2, p <0.001), burnout, OR: 3.4 (95% CI: 1.02–11.4, p = 0.045), psychological demands at work, OR: 4.2 (95% CI: 1.5–12.1, p = 0,007), and depression, OR 2.9 (95% CI: 1.12–7.7, p = 0.028) were identified as determinants of fatigue. Conclusions The job stress persistence can lead to chronic fatigue syndrome, and this probably is affecting the quality medical care afforded.
Objective To evaluate auditory dysfunction in workers exposed to low doses of solvent mixtures. Methods 77 workers exposed to solvents as well as a control group of 84 non-exposed individuals were studied. Fourteen solvents were measured, including toluene, xylene, and n-hexane. Pure tone audiometries were performed at 125 Hz to 8 KHz, as well as brainstem evoked response. Results In the exposed group, subjects’ hearing decreased in the measured frequencies, in both ears. Robust multiple linear regression models for frequency means between 125 Hz and 8 KHz, for the left ear R2 = 33.3%, exposed β = 4.1 (p<0.001) and for the right ear R2 = 38%, exposed β = 4.8 (p<0.001), adjusted by age, chronic pathologies and environmental noise exposure. There was major latency in waves III and V and in intervals I-V and I-III (p<0.05), in both ears, adjusted for age and chronic pathologies. Conclusions It is likely that low exposures to solvent mixtures affect hearing and their central pathways. It is important to elucidate whether this affection could indicate incipient ototoxicity and neurotoxicity.
Objective This cross sectional study was conducted to determine the prevalence of musculoskeletal disorders (MSDs) among government dental personnels in Khon Kaen Province of Thailand. Methods There were 282 dental personnels enrolled into this study. Data were collected by interviews with the modified structural questionnaires. Descriptive statistics were used to describe characteristics and inferential statistics were MSDs prevalence and confidence interval (95%CI). ResultsThe results showed that most participants were female (81.9%), the minimum and maximum age were 20 years and 59 years, respectively (mean = 32.8 ± 9.4 years). Most participants had body mass index at normal level (18.5 -22.9 kg/m 2 ) for 55.3%. Most positions were dental nurses (46.4%), dentists (22.0%) and patient assistants (18.1%), respectively.For the last 7-day and 1 month period, the prevalence of MSDs were 57.8% (95% CI = 0.52 -0.64) and 93.6% (95% CI = 0.91 -0.96), respectively. The highest prevalence at severe level of pain were found at areas of shoulder (23.0%), lower back (18.1%), and neck (15.6%), respectively. Frequency of MSDs concidering everyday accurence found on areas of neck (12.8%), lower back (7.1%), shoulder (6.4%) and upper back (6.4%), respectively. Among 264 MSDs cases of dental personnels, the report of pain impacted to daily activity was 76.1%. The report of work was related-MSDs was 71.2%. Symptoms was occured at evening time after work ( 41.3%). The intake of painkillers or treatment by Thai traditional medicine program was 64.4%. Conclusions The results identified neck-shoulder-back pain among dental personnels by showing the severity and the frequency of pain. Therefore there should be the health surveillance program of neck-shoulder-back pain among dental personnels. This findings are useful for the prospective cohortstudy to find out the risk factors for neck-shoulder-back pain among dental personnels.
Background Blood lead continues to be a health risk for Mexican workers. Objective To identify blood lead predictors and the prevalence of neuropsychiatric symptoms in firearm users. Material and Methods A cross-sectional study was performed on 65 males. We obtained socio-occupational and determined venous blood lead (BPb), as well as neuropsychiatric symptoms using the Q-16 questionnaire. Results The mean (SD) [min-max] age was 34.8 (6.9) [21–60] years; mean number of years working at the company was 14 (8.5) [1–48] years. Twenty percent (13) used leaded glazed clay pottery (PbGC) in the kitchen. During practice they fired a mean 72 shots (60) [20–250], and during their employed life 5483 (8322.5) [200 to 50 000]. Mean BPb was 6.4 (2.8) [2.7–14.4] mcg/dL. Two caretakers at the firing range had 29.6 and 51.7 mcg/dL BPb. Subjects who went to practice 12 or more times a year reported a greater percentage of miscarriages in their partners (24% vs 0%). Twelve percent (8) showed an increase ³5 in neuropsychiatric symptoms. The BPb multiple linear regression model explains R 2 = 44.15%, as follows: those who had ≥ 12 practice sessions per year β = 0.5339 and use of PbGC β = 0.3651. Conclusions Using firearms and PbGC contribute to increasing BPb in the studied personnel. The BPb concentrations found, despite being low, are a health risk, as evidenced by the prevalence of neuropsychiatric symptoms. The caretakers at the shooting range are at a higher risk.
Objectives Bone lead level is a good indicator of cumulative exposure. Aim research paper was to characterize lead exposure and identify main predictors of bone lead in workers at a lithography press. Methods The study population consisted of 90 active workers. Their bone lead levels were determined using the X - K fluorescent rays method. Measurements were in micrograms lead per gram mineral bone (μgPb/gmb) in patella (PbP), tibia (PbT), blood (PbB), air (PbA), and lead present on hands before (PbBe) and after washing (PbAf). Two multiple linear regression models were constructed for each bone, because colinearity. Results Mean, standard deviation (SD), and [range] were as follows. Age: 45 years (13) [20, 75]; seniority at the lithography press: 10.6 years, (9.3) [1, 40]; seniority at both printing presses: 20 years (15.5) [1, 65]; PbB: 12.3 mg/dL + 5.2, [3.4, 30.3]; PbP: 43.3 μgPb/gmb + 28.5 [-4.82, 136.9], PbT: 25.9 μgPb/g + 18.8 [-20.1, 74.2]; PbA 0.54 (mg/m3). GM (geometric mean): PbBe: 848.1 mg/m2 [27, 158 537] and PbAf 73 mg/m2 [3, 1463]. The PbP and PbT models explain 44% and 55% of accumulated lead variability, respectively; their predictors were: PbB β = 1.24 (p = 0.020) and β = 0.93 (p = 0.003); the seniority total years sum at both presses, β = 0.76 (p<0.001) and β = 0.34 (p = 0.007); the exposure categories: medium β = -1.60 (p = 0.83) and β = 2.79 (p = 0.52); high, β = 12.5 (p = 0.16) and β = 16.9 (p = 0.004); and very high, β = 15.4 (p = .048) and β = 18.0 (p<0.001), respectively, using low exposure as a reference. Conclusions Although air lead exposure was low, bone lead concentrations were high, similar to those found in workers with greater exposure. In both models the PbP and PbT accumulation is determined by the intensity of exposure (PbB) and the seniority sum years with lead exposure, as well as various exposure levels, according to the workplace, and working an additional shift at a similar press.
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