[Analysis on infertility status and influencing factors of female workers among reproductive age in China's nine industries].

Objective: To investigate the infertility rate and influencing factors of female workers in China's nine industries. Methods: Using multi-stage sampling method, from January to November in 2016. A cross-sectional survey was conducted on the infertility of 33 685 female workers in the nine industries including medical and health, petrochemical, metallurgy, railway, machinery manufacturing and electronics,a questionnaire survey. First, three provincial capitals were randomly selected in seven regions. And then we consulted and communicated with the hospital of the provincial city's occupational disease prevention and treatment, marking and coding the target enterprise within its jurisdiction, In these enterprises, we randomly selected five companies. Finally, all women workers who meet the inclusion criteria were surveyed in those enterprises which were drawn. Use the"female workers reproductive health questionnaire" to collect female workers demographic status, occupational status and reproductive status and other data. The single factor analysis of infertility was performed by chi-square test. Multivariate analysis of infertility was carried out by logistic regression model. Results: The age of female workers in the nine industries was (35.98±7.98) years. The infertility rate for one year of female workers in typical industry was 24.81% (8 358/33 685), the infertility rate for two years being13.47% (4 537/33 685), the infertility rate for two years being 10.78% (3 632/33 685). Compared to the east China region, the infertility rate was the highest in the south region ( OR= 1.90, 95% CI: 1.66-2.17). Compared to non-working women, the infertility rate was the highest among railroad ( OR= 1.68, 95% CI: 1.43-1.98) and financial industries ( OR= 1.64, 95% CI: 1.38-1.95). Occupational exposure to heavy metals ( OR= 1.15, 95% CI: 1.04-1.27) and occupational exposure to hazardous physical factors ( OR= 1.09, 95% CI: 1.01-1.17) were infertility risk factors. Conclusion: The infertility rate of female workers in the nineindustries was high. And the region, industry, occupational exposure to heavy metals and occupational exposure to hazardous physical factors, were independent risk factors for infertility.