The Efficacy and Cost-effectiveness of Malaria Prevention in Pregnancy in an Area of Low and Unstable Transmission in Kabale, Uganda: Use of Intermittent Preventive Treatment and Insecticide-treated Nets.
试验速览
- 阶段
- 3 期
- 状态
- 已完成
- 入组人数
- 4,775
- 试验地点
- 1
- 主要终点
- mean birthweight
研究概览
简要总结
The purpose of this study is to compare the efficacy and cost-effectiveness of three alternative strategies for the prevention of malaria during pregnancy in an epidemic-prone area of low transmission in the East African Highlands.
The strategies being compared are:
- intermittent preventive treatment with sulfadoxine-pyrimethamine (IPT-SP)
- an insecticide treated net (ITN), and
- intermittent preventive treatment with SP plus an ITN
In addition to the main individually-randomised trial, outcome data was subsequently also gathered on pregnant women whose houses where sprayed with indoor residual insecticides (IRS) as part of a non-randomised district-wide control programme to compare the impact of IRS with the three intervention arms.
详细描述
Susceptibility to malaria infection during pregnancy and the severity of clinical manifestation are determined by the level of pre-pregnancy immunity, which depends on intensity and stability of malaria transmission. Most intervention trials to prevent malaria during pregnancy have been conducted in areas of intense transmission. The results of trials conducted in high-transmission areas may not be applicable to low transmission areas, where malaria is less frequent but the risk of spontaneous abortion and stillbirth is very high in women of all parities due to lack of sufficient malaria immunity. Routine chemoprophylaxis is generally not recommended in areas of unstable malaria transmission. However, intermittent treatment with an effective anti-malarial drug may be beneficial, especially during periods of malaria transmission. Little work has been carried out amongst pregnant women living in areas of low and unstable transmission in Africa. No data are available on the cost-effectiveness of malaria control in low transmission settings.
This study will compare the efficacy and cost effectiveness of three preventive strategies for the control of malaria during pregnancy in low-transmission settings. The study is located in Kabale district, a highland area in SW Uganda.
Women attending antenatal care are randomised to receive either:
- intermittent preventive treatment with sulfadoxine-pyrimethamine (IPT-SP)
- an insecticide treated net (ITN), or
- intermittent preventive treatment with SP and an ITN. It is hypothesized that when combined with IPT-SP, the additional impact of ITNs by reducing exposure may be greatest where the intensity of transmission is low.
In addition to the main individually-randomised trial, outcome data was subsequently also gathered on pregnant women whose houses where sprayed with indoor residual insecticides (IRS) as part of a non-randomised district-wide control programme to compare the impact of IRS with the three intervention arms.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Prevention
- 盲法
- Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
入排标准
- 性别
- Female
- 接受健康志愿者
- 否
入选标准
- •Pregnant women whose pregnancies are at <27 weeks gestation at first antenatal booking
- •Permanent resident in study area
- •Informed consent
排除标准
- •Late presentation: pregnancies more than 26 weeks gestation at first antenatal booking
- •Severe anaemia (Hb<70g/L) on enrolment
- •Previous reaction to a sulfa-drug (e.g. sulphadoxine-pyrimethamine, septrin)
- •History of severe skin reaction to any drug
- •Current (or history) of severe disease (e.g. hepatitis, jaundice, TB, AIDS)
- •Withdrawal Criteria:
- •Withdrawal of consent
- •Women developing severe anaemia (Hb<70g/L)during pregnancy
研究组 & 干预措施
2
Device: Insecticide-treated mosquito bed net
干预措施: Insecticide-treated mosquito bed net (Device)
3
Combination of Drug + Device:
Drug: Intermittent preventive treatment:sulphadoxine-pyrimethamine Device: Insecticide-treated mosquito bed net
干预措施: Insecticide-treated mosquito bed net (Device)
结局指标
主要结局
mean birthweight
时间窗: April 2004-Jan 2007
prevalence of low birthweight
时间窗: April 2004 - Jan 2007
次要结局
- spontaneous abortions(Feb 2003 - Jan 2007)
- maternal anaemia - mean Hb at gestational age 36 weeks, prevalence of Hb<100g/L at gestational age 36 weeks(Feb 2003 - Jan 2007)
- stillbirths(April 2003-Jan 2007)
研究者
Brian Greenwood
Professor
London School of Hygiene and Tropical Medicine