[Analysis of the detection of occupational contraindications in Guangzhou area from 2021 to 2023]

Objective: To investigate the incidence characteristics of occupational contraindications among workers exposed to occupational hazard factors in the Guangzhou area and providing reference data for effective occupational health surveillance. Methods: In March 2024, a cross-sectional study was conducted to collect health examination data from individuals who underwent occupational health examinations at the Guangzhou Occupational Disease Prevention and Treatment Institute between 2021 and 2023. Statistical analysis was performed on the detection rates of occupational contraindications across different genders, ages, examination categories, and occupational hazard factors/special operations. Intergroup comparisons were conducted using t-tests, or analysis of variance (ANOVA), group comparisons were conducted using chisquare (χ(2)) tests. Results: A total of 205938 occupational health examinations were screened, yielding 2883 detected cases of occupational contraindications (detection rate: 1.40%). Among these, 1971 cases (68.37%) were identified during active employment (χ(2)=208.41, P<0.001) ; males accounted for the majority (2673 cases, 92.72%), with no statistically significant gender difference (χ(2)=0.02, P=0.893). The primary exposure hazard factors or special operations included noise exposure (1443 cases, 47.64%), high-temperature work (567 cases, 18.72%), and occupational motor vehicle driving (356 cases, 11.75%). Significant differences in detection rates were observed across years, age groups, and hazard factors/special operations (χ(2)=6.43, 972.62, 2861.94; all P<0.05) . Conclusion: The detection rate of occupational contraindications among workers exposed to occupational hazard factors in the Guangzhou area is relatively low, predominantly affecting young and middle-aged male workers engaged in on-the-job activities. Targeted health surveillance should be intensified for key populations and core hazard factors to mitigate occupational health risks.