Abstract:
OBJECTIVES:To determine whether the dose of vitamin A currently recommended by the World Health Organization or half this dose gives better protection against childhood morbidity and mortality. DESIGN:Randomised study. SETTING:A combined oral polio vaccine and vitamin A supplementation campaign in Guinea-Bissau, Africa. PARTICIPANTS:4983 children aged 6 months to 5 years. INTERVENTIONS:One of two doses of vitamin A (recommended and half); oral polio vaccine. MAIN OUTCOME MEASURES:Mortality and morbidity at six and nine months. RESULTS:Mortality was lower in the children who took half the recommended dose of vitamin A compared with the full dose at both six months (mortality rate ratio 0.69, 95% confidence interval 0.36 to 1.35) and nine months (0.62, 0.36 to 1.06) of follow-up. There was a significant interaction between sex and dose, the lower dose being associated with significantly reduced mortality in girls (0.19, 0.06 to 0.66) but not in boys (1.98, 0.74 to 5.29). The lower dose of vitamin A was consistently associated with lower hospital case fatality in girls (0.19, 0.02 to 1.45). Paradoxically, in children aged 6-18 months, the low dose was associated with slightly higher morbidity. CONCLUSIONS:Half the dose of vitamin A currently recommended by WHO may provide equally good or better protection against mortality but not against morbidity.
journal_name
BMJjournal_title
BMJ (Clinical research ed.)authors
Benn CS,Martins C,Rodrigues A,Jensen H,Lisse IM,Aaby Pdoi
10.1136/bmj.38670.639340.55keywords:
subject
Has Abstractpub_date
2005-12-17 00:00:00pages
1428-32issue
7530eissn
0959-8138issn
1756-1833pii
bmj.38670.639340.55journal_volume
331pub_type
杂志文章,随机对照试验abstract:OBJECTIVE:To determine whether short-term, oral low dose prednisolone (< or = 15 mg daily) is superior to placebo and non-steroidal anti-inflammatory drugs in patients with rheumatoid arthritis. DESIGN:Meta-analysis of randomised trials of oral corticosteroids compared with placebo or a non-steroidal anti-inflammatory...
journal_title:BMJ (Clinical research ed.)
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abstract:OBJECTIVE:To compare the effectiveness of elective single embryo transfer versus double embryo transfer on the outcomes of live birth, multiple live birth, miscarriage, preterm birth, term singleton birth, and low birth weight after fresh embryo transfer, and on the outcomes of cumulative live birth and multiple live b...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,meta分析,评审
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更新日期:2010-12-21 00:00:00
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journal_title:BMJ (Clinical research ed.)
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abstract:OBJECTIVE:To review the evidence for ethnic differences in susceptibility to adverse drug reactions (ADRs) to cardiovascular drugs. DESIGN:Systematic review and meta-analysis. DATA SOURCES:We searched Medline and Embase to March 2005. Reference lists of identified articles were hand searched for further relevant arti...
journal_title:BMJ (Clinical research ed.)
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更新日期:2006-05-20 00:00:00
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更新日期:2003-07-26 00:00:00
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更新日期:1996-05-25 00:00:00
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更新日期:2009-02-26 00:00:00
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更新日期:2020-02-19 00:00:00
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更新日期:1999-05-08 00:00:00
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更新日期:2016-09-13 00:00:00
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更新日期:1994-06-11 00:00:00
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更新日期:2016-02-24 00:00:00
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更新日期:1999-12-11 00:00:00