1. Establishment of Job-Exposure Matrix of Silica dust, 1953 - 2000, Shanghai Zhu Su-rong Institute of Public Health Inspection, Shanghai Municipal Health Bureau, Shanghai, 200031

2. This lecture will address the following: Background Definition Data and Methodology Results Discussion

3. Background 1 Job-Exposure Matrix of Shanghai (1) ---- The establishment of Database for Chemical Occupational Hazards 2003, 20(2) Journal of Environ & Occup Med 2 Job-Exposure Matrix of Shanghai ---- The analysis of the intensity of occupational benzene exposure 1953-1989 2004,2(1) Journal of Environ & Occup Med 3 The establishment of Job-Exposure Matrix for TCE of Shanghai 2006,23(3) Journal of Environ & Occup Med 4 Establishment of Job-Exposure Matrix of Benzene for Painter in Shanghai 2008,25(1) Journal of Environ & Occup Med 5 Establishment of Job-Exposure Matrix of silica,1953~200, Shanghai 2010

4. Definition---“silica” Standard Sio 2 ≥10%

5. Data and Methodology Data: Database for Occupational Hazards in Shanghai Methodology: data cleaning: 0,( ELV ， >200mg/m 3 ) period: 9 time periods industry rate: 0, 1, 2, 3 occupation rate: 0, 1, 2, 3 Stat.: multi-regression job-exposure matrix (JEM) :144 cells Software: Excel2003, Access2003, STATA8.0

6. Results—— Mean of year The average concentration of silica dust by year 1953~2000,Shanghai

7. Results——Mean of period Pd Yearn Mean （ mg/m 3 ） 1 1953-1960204723.75 2 1961-1965391425.90 3 1966-1970129528.32 4 1971-1975223727.03 5 1976-1980327023.56 6 1981-1985815023.18 7 1986-19891162615.82 8 1992-1995132923.62 9 1996-2000197302.51 6556112.12 The average concentration of silica dust by period 1953~2000,Shanghai

8. Results——Mean of industry and occupation Industry rate n Mean （ mg/m 3 ） Occupation rate n Mean （ mg/m3 ） 05102.2902722.49 157226.581100507.27 25087411.7924808812.32 3845518.463715117.97 The average concentration of silica dust by industrial and occupational category 1953~2000 Shanghai

9. Results——JEM for silica The Job-Exposure Matrix for intensity of silica dust 1953~2000 in Shanghai :144 cells Period1 Period2 Period3 Mean (mg/m 3 ) Occupation JEM Rating Industry JEM Rating

10. Results ——JEM for silica The Job-Exposure Matrix for intensity of silica dust 1953~2000 in Shanghai :144 cells Period4 Period5 Period6 Mean (mg/m 3 ) Occupation JEM Rating Industry JEM Rating

11. Results ——JEM for silica The Job-Exposure Matrix for intensity of silica dust 1953~2000 in Shanghai :144 cells Period7 Period8 Period9 Mean (mg/m 3 ) Occupation JEM Rating Industry JEM Rating

12. Results ——compare the different results The comparison of results on the intensity of silica dust by different process 1953~2000 in Shanghai

13. Discussion How to time the period How to use the industry and occupation rate The original and the predicable result Spot monitoring and the TWA

14. Thanks J. Coble, JI Bu-tian OEEB ， DCEG ， National Cancer Institute, Bethesda, MD USA 20892 Lu Wei, Xue Shou-zheng, Jia Xiao-dong, Peng Juan- juan Shanghai Municipal Centers for Disease Control & Prevention ， Shanghai, 200336 Zhu Jun Institute of Public Health Inspection, Shanghai Municipal Health Bureau, Shanghai, 200031