ABSTRACT
Objective To assess the reliability and validity of the Chinese version of Driving Anger Scale (DAS) in professional drivers in China and provide a scientific basis for the application of the scale in drivers in China. Methods Professional drivers, including taxi drivers, bus drivers, truck drivers and school bus drivers, were selected to complete the questionnaire. Cronbach's α and split-half reliability were calculated to evaluate the reliability of DAS, and content, contract, discriminant and convergent validity were performed to measure the validity of the scale. Results The overall Cronbach'sα of DAS was 0.934 and the split-half reliability was 0.874. The correlation coefficient of each subscale with the total scale was 0.639-0.922. The simplified version of DAS supported a presupposed six-factor structure, explaining 56.371% of the total variance revealed by exploratory factor analysis. The DAS had good convergent and discriminant validity, with the success rate of calibration experiment of 100%. Conclusion DAS has a good reliability and validity in professional drivers in China, and the use of DAS is worth promoting in divers.
ABSTRACT
Objective To assess the reliability and validity of the Chinese version of Driving Anger Scale (DAS) in professional drivers in China and provide a scientific basis for the application of the scale in drivers in China. Methods Professional drivers, including taxi drivers, bus drivers, truck drivers and school bus drivers, were selected to complete the questionnaire. Cronbach's α and split-half reliability were calculated to evaluate the reliability of DAS, and content, contract, discriminant and convergent validity were performed to measure the validity of the scale. Results The overall Cronbach'sα of DAS was 0.934 and the split-half reliability was 0.874. The correlation coefficient of each subscale with the total scale was 0.639-0.922. The simplified version of DAS supported a presupposed six-factor structure, explaining 56.371% of the total variance revealed by exploratory factor analysis. The DAS had good convergent and discriminant validity, with the success rate of calibration experiment of 100%. Conclusion DAS has a good reliability and validity in professional drivers in China, and the use of DAS is worth promoting in divers.
ABSTRACT
Objective:To investigate the relationship between serum carcinoembryonic antigen (CEA) and the predictive value of epidermal growth factor receptor (EGFR) mutations in non-small cell lung cancer patients, as well as to analyze further EGFR muta-tions and CEA levels affecting patient survival. Methods:From March 2009 to March 2011, a total of 387 cases were treated in the Lung Cancer Department in Tianjin Cancer Hospital. Preoperative CEA tumor marker and postoperative EGFR gene mutation were used for routine detection. The influence of CEA tumor marker on EGFR mutation and its relationship with the prognosis were ana-lyzed further. Results:A total of 168 cases involved EGFR mutations, the incidence of which is more frequent in women, non-smokers, adenocarcinoma patients, and patients below 60 years old (P20). The positive rates of EGFR mutations were 40.1%, 47.5%and 66.6%(P=0.003). Logistic regression analysis determined that CEA levels are inde-pendent factors in predicting EGFR mutations and independent prognostic factors in patients with non-small cell lung cancer. Conclu-sion:Serum CEA levels can independently predict the prognosis of resected non-small cell lung cancer patients, which is has a close re-lationship with EGFR mutations.