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Breast-feeding dose (ratio of breast-feedings to other feedings) was categorized as full, most, equal, less, or no breast-feeding. RESULTS: Compared with no breast-feeding, full breast-feeding infants had lower odds ratios of diarrhea, cough or wheeze, and vomiting and lower mean ratios of illness months and sick baby medical visits. Most breast-feeding infants had lower odds ratios of diarrhea and cough or wheeze, and equal breast-feeding infants had lower odds ratios of cough or wheeze. Full, most, and equal breast-feeding infants without siblings had lower odds ratios of ear infections and certain other illnesses, but those with siblings did not. Less breast-feeding infants had no reduced odds ratios of illness. Findings did not vary by income. CONCLUSIONS: Full breast-feeding was associated with the lowest illness rates. Minimal (less) breast-feeding was not protective. Breast-feeding conferred similar health benefits in all economic groups. <\/jats:p>","DOI":"10.2105\/ajph.89.1.25","type":"journal-article","created":{"date-parts":[[2011,12,2]],"date-time":"2011-12-02T06:34:07Z","timestamp":1322807647000},"page":"25-30","source":"Crossref","is-referenced-by-count":172,"title":["Breast-feeding and infant illness: a dose-response relationship?"],"prefix":"10.2105","volume":"89","author":[{"given":"J","family":"Raisler","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C","family":"Alexander","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"P","family":"O'Campo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"844","reference":[{"key":"p_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-3476(05)80023-X"},{"key":"p_2","doi-asserted-by":"publisher","DOI":"10.2307\/1965599"},{"key":"p_3","doi-asserted-by":"publisher","DOI":"10.1001\/jama.1986.03380070093026"},{"key":"p_4","doi-asserted-by":"crossref","first-page":"896","DOI":"10.1542\/peds.78.5.896","volume":"78","author":"Leventhal JM","year":"1986","journal-title":"Pediatrics."},{"key":"p_5","doi-asserted-by":"crossref","unstructured":"Kovar MG, Serdula MK, Marks JS, Fraser DW. 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