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b>Moses et al., Iron Deficiency and Malaria Methods: A total of 785 Tanzanian children living in an area of intense malaria transmission were enrolled at birth, and intensively monitored for parasitemia and illness including malaria for up to 3 years, with an average of 47 blood smears. We assayed plasma samples collected at routine healthy-child visits, and evaluated the impact of iron deficiency (ID) on future malaria outcomes and mortality. Based on the above description from the abstract, the study design used by the researchers was a:
b>Ganesh et al., Diet and Colorectal Cancer Methods: The period of data collection was 1989–1992 that included subjects who visited TMH [Tata Memorial Hospital, Mumbai, India] for diagnosis and treatment. Patients were interviewed at the out-patient department of TMH, prior to diagnosis. The information was recorded in a pre-designed questionnaire that included demographic characteristics (age, sex, religion, etc.), life-style (habits such as smoking, chewing, alcohol drinking, etc.), dietary habits and dietary items. After interviewing the patient, cancer cases and controls were segregated based on the diagnosis. […] there were 203 cases of ‘colorectal’ cancers and 1628 controls (unmatched) that were considered as eligible entrants for this study. The questionnaire contained socio-demographic information, life-style habits like chewing, smoking, alcohol consumption and dietary items. The questionnaire on food items were based on recollection of consumption of routine food items prior to 1-year of the date of interview. Information on food frequency per week was also collected. What type of study does this Methods section describe?
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