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Observed incidence rates for OC among current smokers and nonsmokers by CD4 cell count (categorized) at event: Smoker-Low CD4 cell count:1990.05; Smoker-High CD4 cell count: 2912.62; Non-smoker-Low CD4 cell count: 1116.07; and Non-smoker-Low CD4 cell count: 590.41 per 100,000 person-months.
