In the case-control study that is described for this assignment, why do we not need to worry about ng due to sex (male/female)? (2 pts)Summary: After identifying cases and controls, the investigators went to each of the textile mills and reviewed employment records to identify the duration of employment, the specific tasks each woman had, and the types of materials she worked with. To assign exposure, the investigators used an algorithm based on detailed investigations previously conduced by the Institute for Industrial Hygiene that laid out ranges of silica dust exposure that might be expected when working with various textiles and processes. The investigators used this information to identify the cumulative dose of silica dust and the duration of time working. Women were included in the analysis if employment at the mill began at least 20 years before the diagnosis of cancer. The women may have still been working at the mill when cancer was diagnosed or they may have retired. The results showed that compared to women with no exposure to silica dust, those with cumulative low amounts of exposure to silica dust had 20% higher odds of esophageal cancer