establishment of job-exposure matrix of silica dust, 1953 - 2000, shanghai zhu su-rong institute of...
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Establishment of Job-Exposure Matrix of Silica dust, 1953 - 2000, Shanghai
Zhu Su-rongInstitute of Public Health Inspection, Shanghai Municipal Health Bureau, Shanghai, 200031
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This lecture will address the following:
Background Definition Data and Methodology Results
Discussion
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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
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Definition---“silica”
Standard Sio2≥10%
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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