[ study of the association between oral temperature and sleepiness among night-shift workers in a glass industry]

Night-shift work has adverse effects on workers' health, productivity, and occupational safety. Night workers have complaints about sleepiness, decreased performance, and sleep disorders, due to disruption of circadian rhythm function. This research aimed to determine the level and process of sleepiness among night workers of a hot industry and evaluate its correlation with oral temperature. This study was performed as a cross-sectional study on 80 night-shift workers who were exposed to heat. The sleepiness level of the subjects was measured by Stanford Sleepiness Scale and their oral temperature were recorded at different hours [from 22 pm to 4 am] for two consecutive nights. Data analysis was performed using independent and paired t-tests, one-way ANOVA, repeated measures ANOVA, and Pearson correlation coefficient. The significance level was considered to be p<0.05. In this study, an increasing linear trend over time was obsereved for sleepiness index [p<0.001]. The mean of oral temperature had an increasing trend from 11 pm to 1 am and a decreasing trend afterward [p<0.001]. Also, the mean sleepiness index in the measurement hours of the second night was higher than that of the first night [p<0.001], but, the mean oral temperature in the second night was onsistent with the results obtained in the first night. The sleepiness index among night-shift workers was significantly decreased with increasing oral temperature [r=0.24, p=0.03]. According to the findings of this study, there was an inverse correlation between sleepiness and oral temperature after a few hours of exposure to heat. In this study, sleepiness symptoms were subjectively recorded based on the workers' self-expression; therefore, it is suggested that paraclinical trials, such as hormonal assessments be considered

[ trend of lung cancer incidence rate based on Fars Province cancer registry's data, 2001-2008]

Objective[s]: To determine the trend of crude and age standardized incidence rate of lung cancer in Fars province, southern Iran, from 2001 to 2008. In this epidemiological study, using Fars province cancer registry data the incidence rates were calculated per 100,000 people a year and age standardized incidence rate was performed by direct method using the world standard population

Methods: Data were analyzed by SPSS, version 16 and Microsoft Excel version 2007. Out of 743 lung cancer cases, 72 percent were male and 28 percent were female

Results: The results showed that through an eight-year period the age standardized incidence rate has increased 3.9 times from 1.5 in 2001 to 5. 9 in 2008 per 100,000 people a year. Also, the lung cancer incidence rate in Fars province exhibited an increasing trend and proved to be higher in male and elderly age groups

Conclusion: According to the results, Fars province considered as low incidence rate area in terms of age standardized incidence rate of lung cancer