Establishment of Job-Exposure Matrix of Silica dust, 1953 - 2000, Shanghai

Zhu Su-rongInstitute of Public Health Inspection, Shanghai Municipal Health Bureau, Shanghai, 200031

This lecture will address the following:

Background Definition Data and Methodology Results

Discussion

Background

1Job-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

3The establishment of Job-Exposure Matrix for

TCE of Shanghai 2006,23(3) Journal of Environ & Occup Med

4Establishment of Job-Exposure Matrix of Benzene for

Painter in Shanghai 2008,25(1)

Journal of Environ & Occup Med

5Establishment of Job-Exposure Matrix of

silica,1953~200, Shanghai 2010

Definition---“silica”

Standard Sio2≥10%

Data and Methodology

Data: Database for Occupational Hazards in Shanghai

Methodology: data cleaning: 0,(ELV ，>200mg/m3 ) 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

Results—— Mean of year

0

102030405060708090

100

1 6 11 16 21 26 31 36 41

Year since 1953

Mea

n(m

g/m

3 )

The average concentration of silica dust by year 1953~2000,Shanghai

Results——Mean of period

PdYear n

Mean （ mg/m3

）1 1953-1960 2047 23.75

2 1961-1965 3914 25.90

3 1966-1970 1295 28.32

4 1971-1975 2237 27.03

5 1976-1980 3270 23.56

6 1981-1985 8150 23.18

7 1986-1989 11626 15.82

8 1992-1995 13292 3.62

9 1996-2000 19730 2.51

65561 12.12

The average concentration of silica dust by period 1953~2000,Shanghai

Results——Mean of industry and occupation

Industry

raten

Mean（ mg/m3 ）

Occupation rate

nMean

（ mg/m3）

0 510 2.29 0 272 2.49

1 5722 6.58 1 10050 7.27

2 50874 11.79 2 48088 12.32

3 8455 18.46 3 7151 17.97

The average concentration of silica dust by industrial and occupational category 1953~2000 Shanghai

Results——JEM for silica

The Job-Exposure Matrix for intensity of silica dust 1953~2000 in Shanghai :144 cells

0 1 2 30

12

3

0

10

20

30

40

50

60

0 1 2 30

12

3

010203040

5060

70

80

0 1 2 30

20

5

10

15

20

25

30

Period1 Period2 Period3

Mea

n (

mg

/m3 )

Occupation JEM Rating

Indu

stry

JEM

Rat

ing

Results ——JEM for silica

The Job-Exposure Matrix for intensity of silica dust 1953~2000 in Shanghai :144 cells

0 1 2 30

123

0

5

10

15

20

25

30

Period4 Period5 Period6

Mea

n (

mg

/m3 )

Occupation JEM Rating

0 1 2 30

12

3

05

1015202530354045

0 1 2 30

12

3

0

5

10

15

20

25

30

Indu

stry

JEM

Rat

ing

Results ——JEM for silica

The Job-Exposure Matrix for intensity of silica dust 1953~2000 in Shanghai :144 cells

Period7 Period8 Period9

Mea

n (

mg

/m3 )

Occupation JEM Rating

0 1 2 30

12

3

0

5

10

15

20

25

30

35

0 1 2 30

12

3

0

2

4

6

8

10

12

0 1 2 30

12

3

0

1

2

3

4

5

6

7

8

Indu

stry

JEM

Rat

ing

Results ——compare the different results

0. 00

5. 00

10. 00

15. 00

20. 00

25. 00

30. 00

1 2 3 4 5 6 7 8 9

Period

Mean（

mg

/m3） original

merged

regressive

predical

The comparison of results on the intensity of silica dustby different process 1953~2000 in Shanghai

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

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