Hello,

Could you please help me with the following question? It needs a chart and calculation:

The association between job-related exposure to welding fumes and chronic obstructive pulmonary disease (COPD) was explored in a case-control study. The following data were reported for 399 COPD patients: 37 currently employed as welders; the remainder had no occupational exposure. Among 800 controls, 48 were employed as welders. Set up a 2 by 2 table and calculate the OR (odds ratio) between welding and COPD.

Thank you so much for your help!

(: