When duration of residence in the Eastern Cape was looked at ( Table 3 ) length of residence had a large effect for women (OR=3.6 for 1–34 years; OR=14.7 for 35 or more years) but was only marginally significant for men who had lived there for 35 or more years (OR=3.1).
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Risk factors for oesophageal, lung, oral and laryngeal cancers in black South Africans.
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