Objective To provide scientific support for the prevention and control of expressway traffic injury by analyzing the epidemiological features of expressway traffic injury in China.Methods The secular trend and epidemiologic features of expressway traffic injury from 1994 to 2009 in China were analyzed.The indicators including mortality of mileage,accident rate of mileage,and accident mortality were used to evaluate the severity of expressway traffic injury in China.Cluster analysis was used to compare the differences of accident rate of mileage and accident mortality from 29 provinces,municipalities and autonomous regions.Results Except for the yearly increase of the accident mortality and the fluctuant decrease of the mortality and accident rate of mileage,other indicators reflecting the domestic expressway traffic injury from 1994 to 2009 were increased and then decreased,when the decreased indicators were still higher than those in 1994.In addition to the number of accidents of the four basic traffic injury indicators,the proportions of other three indicators(number of wounded and death,direct property damage)in the road traffic injury were increased year by year and the increase was the most obvious in regard of the direct property damage which had accounted for more than 30％ since 2006.The data from 2007 to 2009 showed that the peak time of traffic accidents was at around 4:00 am and around 4:00 pm.The traffic accidents caused by the drivers accounted for 93.02％ and the drivers with less than five years of driving accounted for 40.92％.Pedestrians and passengers were vulnerable to the expressway traffic injury and the accident mortality was the highest(72.75 per 100 accidents).Rear collision(44.17％)and bumping the fixed objects(16.35％)were the major accident types.There was a high accident proportion on the dry road(77.60％)and sunshine day(65.39％).Conclusions With worsening situation of the expressway traffic injury in China,we should,based on the epidemiological features of traffic injury on expressway,take appropriate measures such as strengthening traffic management of expressway and education of road users and improving the emergency medical service level.

OBJECTIVETo study the incidence and influencing factors of psychological violence among college students in Guangzhou in 2010.

METHODSConvenience sampling method was used and 2 200 college students from 61 classes of three universities in Guangzhou were interviewed with self-designed questionnaire about the incidence and influencing factors of the psychological violence in 2010. The valid sample was 2 060. Chi-square test and multinomial logistic regression were used to assess the incidence and influencing factors of the psychological violence between different genders.

RESULTSA total of 66.3% (1 365/2 060) college students reported having experienced at least one kind of psychological violence during the past 12 months, either as a perpetrator or as a victim. The proportion of psychological violence among males (72.3%, 775/1 072) was significantly higher than that in females (59.7%, 590/988)(&chi;(2) = 36.39, P < 0.05). The incidence of perpetration only, victimization only, and both perpetration and victimization of psychological violence were 16.1% (331/2 060), 8.9% (184/2 060) and 41.3% (850/2 060), respectively. The incidence of victimization only in females was 10.4% (103/988), which was significantly higher than that in males (7.6%, 81/1 072) (&chi;(2) = 5.20, P < 0.05). The incidence of both perpetration and victimization in males was 47.3% (507/1 072), which was significantly higher than that in females (34.7%, 343/988) (&chi;(2) = 33.56, P < 0.05). In males, the multinomial logistic regression showed the risk factors for perpetration only was having harmful behavior habits (OR = 1.90). For victimization only, the risk factors were with siblings (OR = 2.42) and prior mistreatment by teachers from primary to senior high school (OR = 1.78). For both perpetration and victimization, the risk factors were with siblings (OR = 1.88), having harmful behavior habits (OR = 1.98), bad family economic conditions (difficult OR = 1.99, general OR = 1.67) and prior mistreatment by teachers from primary to senior high school(OR = 2.07). In females, the risk factors for perpetration only were self-claimed shortage of monthly living expenses(OR = 2.14) or just enough (OR = 2.26), having harmful behavior habits (OR = 1.69) (all P values<0.05) . For victimization only, the risk factors were bad family economic conditions (difficult OR = 6.67, 15 persons; general OR = 3.81), bullied by others before university(OR = 2.05). For both perpetration and victimization, the risk factors were self-claimed shortage of monthly living expenses (OR = 1.81), bad family economic conditions (OR = 2.43), disharmonious relations between parents (OR = 1.76), physical punishment by parents (OR = 1.66), bullied by others before university (OR = 2.14) and prior mistreatment by teachers from primary to senior high school(OR = 1.73). Having a religious faith was the protective factor (OR = 0.38) (all P values<0.05).

CONCLUSIONThe incidence of psychological violence among college students is very serious in Guangzhou in 2010. And the influencing factors of it between different genders are different. Females are affected by a wider ranges of factors than males, and are more influenced by family and parents.

Adolescent ; Aggression ; classification ; psychology ; Family ; psychology ; Female ; Humans ; Incidence ; Logistic Models ; Male ; Risk Factors ; Sex Factors ; Stress, Psychological ; epidemiology ; Students ; Surveys and Questionnaires ; Universities