title: [Distribution and main influential factors of mental workload of middle school teachers in Nanchang City].
abstract: OBJECTIVE
  To investigate the distribution and main influential factors of mental workload of middle school teachers in Nanchang City.
  
  
  METHODS
  A total of 504 middle school teachers were sampled by random cluster sampling from middle schools in Nanchang City, and the mental workload level was assessed with National Aeronautics and Space Administration-Task Load Index (NASA-TLX) which was verified in reliability and validity.
  
  
  RESULTS
  The mental workload scores of middle school teachers in Nanchang was approximately normal distribution. The mental workload level of middle school teachers aged 31 -35 years old was the highest. For those no more than 35 years old, there was positive correlation between mental workload and age (r = 0.146, P < 0.05). For those more than 35 years old, the levels of their mental workload had no statistically significant difference. There was a negative correlation between mental workload and educational level(r = -0.172, P < 0.05). The middle school teachers with lower educational level seemed to have a higher mental workload (P < 0.01). The longer a middle school teacher worked per day, the higher the mental workload was. Working hours per day was the most influential factor on mental workload in all influential factors (P < 0.001).
  
  
  CONCLUSIONS
  Mental workload of middle school teachers was closely related to age, educational level and work hours per day. Working hours per day was the important risk factor of mental workload. Reducing working hours per day, especially reducing it to be no more than 8 hours per day, may be a significant and useful approach alleviating mental workload of middle school teachers in Nanchang City.
authors.forename: Yuanmei
authors.initials: Y
authors.lastname: Xiao
authors.forename: Weijuan
authors.initials: W
authors.lastname: Li
authors.forename: Qingfeng
authors.initials: Q
authors.lastname: Ren
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Ren
authors.forename: Zhiming
authors.initials: Z
authors.lastname: Wang
authors.forename: Mianzhen
authors.initials: M
authors.lastname: Wang
authors.forename: Yajia
authors.initials: Y
authors.lastname: Lan
mesh_terms: D000328:Adult; D005178:Faculty; D005260:Female; D006801:Humans; D008297:Male; D008603:Mental Health; D008875:Middle Aged; D016272:Occupational Health; D011569:Psychiatric Status Rating Scales; D015203:Reproducibility of Results; D012307:Risk Factors; D012574:Schools; D013315:Stress, Psychological / Q000175:diagnosis / Q000523:psychology*; D011795:Surveys and Questionnaires; D013647:Task Performance and Analysis; D014937:Work; D016526:Workload / Q000523:psychology*