Objective To observe the physical development indexes of students from a teenager aviation school and to find out about the trainees′characteristics of physical development in order to advise on medical selection of teenager flying cadets and improve the present training programs .Methods Four hundred and thirty six students Grade 2015 were selected as subjects .The data of their physical examinations between school selection examination and annual examination were compared via matched-pair design.Physical growth and development of students in the aviation school were analyzed . Results The height, relative body mass and body mass index (IBM) of the students changed significantly (P<0.05) after one-year training in the youth aviation school .The proportion of students whose body mass accounted for 85% to 120%of standard weight was increased from 84.40%to 93.12%.94.74%of the increase came from students who used to be underweight .The qualified rate of students who reached the 70%-79% of the standard relative body mass in school selection examination was 57.14%.The reached qualified rate of students who reached the 80%-84% of the standard relative body mass in school selection examination was as high as 95.65%.The average height growth of the students was about 2.0 cm in the previous year .Conclusion The relative body mass of students who reached the 70%-85% of the standard relative body mass in school selection examination improved obviously ,suggesting that we should revise the weight standard to less than 30% of the standard weight , which conforms to the objective law of growth and development of adolescents .The rate of development of adolescent height requires further follow-up observation .All the students of a teenager aviation school should pay attention to a reasonable diet , take more physical exercise and monitor body mass .

By summarizing the results of research on the modernized hospital by the academic circles and using system theories and expert consultations, the paper proposes the technical lines for constructing a framework of modernized hospital appraisal and defines the basic concept of the modernized hospital and its appraisal dimensions, arguing that a humanized, intelligence- and science-based, law-driven, and environment-friendly hospital constitutes the basics of the modernized hospital. At the same time the paper further clarifies several relationships that need to be well handled in appraising the modernized hospital on the basis of theoretical systems.

Objective To discuss the reasons for the difference in the results of medical checkups for cardidates enlisted in teenager aviation classes, in order to offer tips for the establishment of regional training programs and improve the qualification rate and acceptability.Methods A total of 2894 junior high school graduates as candidates for selection to teenager aviation classes in 2015 were given a double-blind medical examination.Cross-sectional survey methodology was used to compare the differences in the results of physical examinations, for candidates from seven areas.Results The qualification rate of physical checkups in the above regions were significantly different.The regional differences in the rejection rate related to ophthalmology, surgery, neurology and ultrasound were significant(P <0.05),but the regional differences in the rejection rate in internal medicine and ENT were not(P>0.05).The vision, height and relative body mass in different regions were significantly different (P<0.05)except for blood pressure test (P>0.05).Conclusion The physical differences are the results of various factors.In order to improve the passing rate of candidats, the aviation training plan for teenager aviation classes should consider the geography, climate, socio-economic environment and the physical health of local students.We should implement training programs in line with local conditions reather than use a unified national standard.

Objective To provide an effective theoretical basis for future selection and recruitment of military flying cadets.Methods Two hundred military qualified flying cadets by comprehensive assessment samples and 200 military flying cadets by medical fitness samples were interviewed with questionnaires and subjected to a physical examination.The comprehensive assessment samples were classified by symptoms and attributive specialties for statistical analysis.A database was established, cleaned and analyzed by EpiData 3.02, SPSS 16.0 with double checking.Results There was no differ-ence between the comprehensive assessment team and the medical fitness team in age, areas, academic scores and psycho-logical performance.The ten top symptoms according to the comprehensive assessment were abnormal chest circumference, abnormal body mass,iris cyst,abnormal hypersplenotrophy,gallbladder polyps,flat foot,skin disease, intrahepatic calcifica-tion focus, joint disease and reproductive system disease.The attributed specialties included surgery, ultrasonics, ophthal-mology,ENT,radiology, ECG and internal medicine departments.The surgery and ultrasonics department contributed the most from the comprehensive assessment and accounted for 55.52%and 16.37%, respectively.Conclusion The compre-hensive assessment for military flying cadets has an important effect on military aviator selection.Continuous observation should be carried out among the military flying cadets by comprehensive assessment in their aviation training.

Objective To improve the selection of flying cadets of the Air Force of People′s Liberation Army of China ( PLAAF) by analyzing the differences of medical identification of lumbar spondylolysis between PLAAF and the US Air Force ( USAF) .Methods Flight crew who had been checked for lumbar spondylolysis during hospitalization at the Air Force General Hospital between 2013 and 2015 were chosen.The results of their medical identification were compaired according to PLAAF and USAF Medical Standards Directory, and their differences and possible reasons were analyzed accordingly.Results The qualified rate of PLAAF was about 85%, which was very close to the standards of USAF, but the difference was not of any statistical significance(P>0.05).Conclusion The standards of our medical identification of lumbar spondylolysis was similar to those of USAF, suggesting that the selection of flying cadets can be improved.

Objective To study the applicability of Vienna Test System ( VTS) to psychological screening of flying cadets,and to establish a corresponding standard model for flying cadets .Methods VTS and pilot psychological selection system were used to evaluate the mental health of 134 cases of flying cadets , SPSS 13.0 was used to compare their consistency and relevance.Results The results of VTS included the raw score of overall mean duration [(46.68 ±21.06)s] on 2hand test, the correct reaction times (246.54 ±25.88) on DT test, the normal values of overall mean duration [(27.84 ±21.98)s] on 2 hand test,and the correct reaction times (60.57 ±18.61) on DT test and other indexes. Pearson coefficient was calculated as predictive validation .The composite score of VTS was significantly positively correla-ted with the first platform(r=0.46,P<0.0001), the second platform(r=0.27,P<0.05) and the psychological perform-ance of the pilot psychological selection system (r=0.31,P<0.05).Kappa-test showed that the two methods were highly consistent(Kappa=0.53).Conclusion The application of VTS to screening the mental health of flying cadets can yield and quick but accurate results , which are of high reliability and validity .It is undoubtedly of great significance for improving the level of aviation security ,objectivity of selection results and predictive validity .

Objective To compare the medical selection standards of flying cadets in the nervous and mental system between Air Force of PLA(PLAAF) and the US Air Force(USAF), and to offer suggestions on revising PLAAF medical standards for flying cadets .Methods All our candidates who had participated in the final medical selection of flying cadets were subjected to neurological examinations , and determined as qualified or not according to USAF Medical Standards Directory.Results 123 people were disqualified during the neurological examination , accounting for 1.1% of the total. According to USAF Medical Standards Directory , 13 of them were disqualified , 24 of them were qualified , and 86 of them needed a second examination .There was marked difference between disqualification rates of PLAAF and USAF .Conclusion There are some differences in medical selection standards for flying cadets in the nervous and mental system between PLAAF and USAF, and we could revise PLAAF standards using USAF standards for reference .

Objective To investigate the effect of different medical standards for the urinary system on the enlistment of pilots between PLAAF and USAF , and offer support to amendment .Methods Data on pilots′final enlistment between 2012 and 2015 were analyzed , and results of physical examinations of the urinary system were compared according to differ -ent medical standards .Results One hundred and twenty teenagers enrolled in this examination were disqualifiied due to defects of the urinary system while 97 applicants were qualified after comprehensive assessment of the urinary system .The main problems with the urinary system that affected results of pilots′enlistment were nephroptosia , renal cyst , microscopic hematuria , renal calcified foci and calculus .Conclusion Medical standards for the urinary system are different between PLAAF and USAF, especially those for nephroptosia , renal cyst and microscopic hematuria .The medical standards directo-ry about the urinary system approved by USAF can serve as a reference during our revision of current medical enlistment standards.

Objective To compare the physical examination results of nephroptosis in the second stage and the final stage, to find the underlying reasons, and to explore better ways to detect nephroptosis.Methods A total of 1334 subjects participated in both the second stage and final stage of PLA air force medical selection of flying cadets, and physical examination results of both stages were compared.Results All the subjects recruited denied a history of abdominal pain or recurrent urinary tract infection, and urine tests were normal.The positive rate of nephroptosis in the second stage was 10.2%, compared to 5.5% in the final stage.The difference of physical examination results in the two stages was significant, and so was that of disqualification rates.Conclusion Results of physical examination of nephroptosis in the second stage are different from those in the final stage.It′s necessary to find better ways of detection of nephroptosis.

Objective To evaluate the medical indexes for student pilots from different areas , to discover the major different indexes between different areas ,and to establish the space distribution model of military pilots .Methods A cross-section survey was conducted among student pilots , and 290 student pilots sampled as respondents were interviewed with questionnaires and subjected to a physical examination , involving distant vision , heart function , and pulmonary function , before a database was established , cleaned and analyzed by EpiData 3.02, SAS 9.13 with double checking .Results There was no difference between the medical indexes of student pilots from 7 areas, but the psychological selection performance record and the entrance examination record were different .Student pilots from area E had the highest psychological selection performance record while those from area D had the highest entrance examination record .Conclusion Student pilots have area difference ,so we should pay close attention to their birth place during recruitment of student pilots .