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BioMed Research International
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2020
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Article
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Tab 2
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Research Article
Effects of Occupational Hazards on Job Stress and Mental Health of Factory Workers and Miners: A Propensity Score Analysis
Table 2
Participants before and after matching.
Items
Positive group
Control group
Before matching
2898
3222
After matching
2498
2498
Unmatched
400
724