Effect Of Occupational Stress On Reproductive Hormone In Railway Policemen

Occupational stress was one of the most import problems of mental and health hazards in occupational group at present. Its influence on occupational health and socio-economic was more and more emphasized. The railway policemen's work belongs to mental and physical combination, which was high stress exposure work type. Reproductive endocrine system was not only involved in stress response, but also was vulnerable hazarded by stress. The stress had become one of common and important causes in reproductive endocrine disorders. Studies had shown that occupational stress had a certain impact on reproductive hormones. The effect of occupational stress on reproductive hormone in railway policemen and male attendants provided a theoretical basis for the mechanism of its influence on male reproductive function.Part One: Investigation and Analysis of Occupational Stress in Railway PolicemenObjective: To study and compare the occupational stress between railway policemen and the male attendants.Methods: 105 railway policemen from Fuzhou branch of a railway were studied as the object. Cluster sampling the male attendants from the same the railway were selected as the control, who had the same working environment and eating habits.They were both had≥3 years working age an the secondary and higher educational level. To studied by the investigate occupational stress scale, including 3 subscales,14 sub-entries and 140 entries. A Type behavior was by the well-known British Professor Cooper "A Type Behavior Scale", a total of 14. Anxiety used the state / trait anxiety questionnaire (STAI).Results: To control the factors, age, working age and educational level as a covariate, using covariance analysis and comparing the scores of occupational stress between the railway policemen and the attendants. The railway policemen's scores of occupational stress (279.68±38.35), occupational role (169.18±21.62) and stress response (161.95±24.90) were higher than attendants'(265.95±46.44, 110.35±21.00, 103.01±25.51). Each sub-project analysis showed, the railway policemen had higher scores than attendants in"role overload"(30.70±6.00),"role indisposition"(27.92±4.01) ,"responsibility" (27.84±5.34) and"working environment"(37.51±6.11) of professional tasks, and "mental strain" (32.90±7.48) and "physical strain" (30.80±8.12) of stress reaction. The railway policemen (46.44±6.02) had higher score of A Type behavior than the attendants(44.42±6.07). The sub-project analysis showed, the railway policemen's"attitude("21.83±3.04)and"ambition"(11.57±2.33)were higher than attendants'. The policemen's state and trait anxiety (49.87±9.10, 48.68±6.95) were higher than attendants'(44.74±8.10,45.48±6.99).The above differences were statistically significant (P<0.01).Conclusion: The railway policemen's occupational stress was higher than attendants', belonging to higher type of work in stress exposure. The railway policemen also had higher A Type behavior and anxiety than the attendants.Part Two: Analysis on the Factors of Occupational Stress in Traffic OfficersObjective: To study the factors of occupational stress in traffic officers.Methods: Merged the railway policemen and attendants from the first part as the traffic officers. The average age was 43.63±8.78 years, and average working age was 21.35±9.67 years. Applications SPSS15.0 established a database for single factor analysis, hierarchical analysis, analysis of covariance, multi-factor Logistic regression model analysis.Results: (1) Age-stratified results showed that occupational stress, occupational tasks and stress responses had downward trend with the increasing of age. The older had lower occupational stress than the young. But the difference wasn't statistically significant (P> 0.05).(2) Stratified on working age, working age from 15 to 25 years group had the highest occupational stress, occupational role and stress response. However, the difference wasn't statistically significant.(3) Stratified for educational level, occupational stress, occupational role and stress responses had an increasing trend with the educational level. The post-secondary and higher education level group had the highest scores. But the difference wasn't statistically significant.(4) Stratified on marital status, married group had the lowest scores of occupational stress, occupational role and stress response. However, the difference wasn't statistically significant.(5) A Type behavior had higher occupational stress, occupational role and response than B Type behavior. But there was no statistically significant difference(6) The higher state of anxiety had higher occupational stress, occupational role and response, but the differences were not statistically significant. In higher trait anxiety, occupational stress, occupational role and response were higher. And the differences were statistically significant.(7) Multi-factor non-conditional Logistic regression analysis (α入= 0.10,α出= 0.15). The results showed that: in addition to the common age entered the regression equation, the occupation (railway policemen) was related to occupational stress (OR = 5.093, P <0.05). Trait anxiety also entered the regression equation (OR = 0.597,0.040, P <0.05).Conclusion:(1)The traffic officers'occupational stress decreased with age. Working age form 15 to 25 years had the highest occupational stress. Occupational stress increased with the educational level, post-secondary and higher education level group had the highest occupational stress. Married group had the lowest occupational stress. A Type behavior had higher occupational stress than B Type behavior. Occupational stress was higher in high trait anxiety than in low trait anxiety.(2)Railway policemen and trait anxiety were significant related to occupational stress. Railway policemen were high exposure group of occupational stress.Part Three: Effect of Occupational Stress on Reproductive Hormone in Railway PolicemenObjective: To study the effect of occupational stress on reproductive hormone in railway policemen.Methods: Detected by radioimmunoassay of reproductive hormones [testosterone (T), luteinizing hormone (LH), follicle-stimulating hormone (FSH)]. Single factor, stratified analysis of the effect of occupational stress on reproductive hormone in railway policemen..Results:(1) Analysis on the reproductive hormone: the railway policemen'FSH (495.03±284.59) was significantly higher than attendants'(586.29±443.70), while the T (495.03±284.59) was lower than the attendants'(586.29±443.70), and the LH little changed.(2) Stratified analysis①T: The railway policemen's T was lower in high trait anxiety. The difference was statistically significant (P <0.05). Educational level only in the high school group, railway policemen's T was lower than attendants'. And there was statistically significant (P <0.05). Marital status analysis, only in the married group, the railway policemen's T was lower than the attendants'. The difference was statistically significant. T in the middle occupational stress was declined significantly and the difference was statistically significant (P <0.05).②LH: In railway policemen high state anxiety group had lower LH, the difference was statistically significant (P <0.05).③FSH: Stratified analysis on A Type behavior and anxiety, the railway policemen's FSH were higher than attendants'. The difference was statistically significant (P <0.05).(3) Multivariate analysis on the factors of reproductive hormoneT, LH, FSH as the dependent variables, occupation, age, working age, marital status, education level, smoking, alcohol consumption, physical activity, A Type behavior, state anxiety, trait anxiety, occupational stress as independent variables, Logistic regression analysis on multiple factors (α入= 0.10,α出= 0.15). The results showed that: Occupation (railway policemen) significantly correlated to T, FSH (OR = 2.872, 0.105, P <0.05). The railway policemen's occupational stress had an impact on reproductive hormone levels, T decreased, FSH increased. Railway policemen'job was an important factor of T and FSH.(4) Analysis on the correlation between reproductive hormonesComparison correlation of three kinds of reproductive hormones, results showed that: T and LH had a negative correlation. LH and FSH were positively related, while the T and FSH had no such correlation.Conclusion:(1) The lowest occupational stress showed a protective effect on body; the body was more sensitive to the secondary occupational stress, with the greatest change in hormone levels; in the highest occupational stress the body produced tolerance, the hormone levels were stabilized.(2) Controlling for age, working age and body mass index, occupational stress caused the decreasing of T level in railway policemen, while increasing of FSH level. T secreted by Leydig cells maintained spermatogenesis, stimulated the growth of genital organs and maintained the normal sexual role. T levels in a certain extent reflected that the Leydig cells were damaged. FSH levels in a certain extent reflected that the Sertoli cells were damaged.