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Breastfed babies are less likely to have eczema as teenagers, study shows

13 November 2017

Babies whose mothers had received support to breastfeed exclusively for a sustained period from birth have a 54 per cent lower risk of eczema at the age of 16, a new study led by researchers from King’s College London, Harvard University, University of Bristol and McGill University shows.

The study, which is published today in the Journal of the American Medical Association (JAMA) Pediatrics, examined more than 13,000 Belarussian teenagers enrolled in the PROmotion of Breastfeeding Intervention Trial (PROBIT) and found a 54 per cent reduction in cases of eczema amongst teenagers whose mothers had received support to breastfeed exclusively.

Eczema causes the skin to become itchy, dry, cracked, sore and red. It affects around one in 5 children and one in 10 adults in the developed world.

The paper’s lead author, Dr Carsten Flohr, whose work is supported by the National Institute for Health Research (NIHR) Biomedical Research Centre at Guy’s and St Thomas’ and King’s College London, said: “The WHO recommends between four and six months of exclusive breastfeeding to aid prevention of allergy and associated illnesses. Our findings add further weight to the importance of campaigns like the Baby-Friendly Hospital Initiative (BFHI), which is tackling low rates of breastfeeding globally.”

The PROBIT study recruited a total of 17,046 mothers and their new-born babies between June 1996 and December 1997. Half of the maternity hospitals and paediatric clinics involved in the study provided additional support modelled on the recommendations of the WHO and United Nations Children's Fund’s BFHI, while the other half continued their usual practices.

Dr Michael Kramer, from McGill’s Faculty of Medicine and the Research Institute of the McGill University Health Centre (RI-MUHC), the Principal Investigator on the PROBIT study, said:

"PROBIT, the largest randomized trial ever carried out in the area of human lactation, continues to yield scientifically and clinically important information more than two decades after its inception."

Professor Richard Martin from the Bristol Medical School at the University of Bristol, added:

“We provide convincing evidence from a large randomised trial of 17,000 mothers and their children that guiding and helping mothers to exclusively breastfeed results in their children having a lower risk of eczema as adolescents.”

The UK has one of the lowest rates of breastfeeding in the world. Only one in three (34 per cent) UK-born babies have received any breast milk, compared with 49 per cent in the United States and 71 per cent in Norway. Only 1 per cent of babies in the UK are exclusively breastfed to six months.

While the study found that the breastfeeding promotion intervention provided protection against eczema there was no reduction in risk of asthma with 1.5 per cent of the intervention group (108/7064) reporting asthma symptoms compared with 1.7 per cent (110/6493) in the control group.

The Promotion of Breastfeeding Intervention Trial (PROBIT) is the largest cluster-randomised controlled trial ever conducted in the area of human lactation during infancy. The trial’s directors are: Professor Michael Kramer (McGill University), Professor Richard Martin (University of Bristol) and Dr Emily Oken (Harvard University).

Paper

'The effect of an intervention to promote breastfeeding on asthma, lung function and atopic eczema at age 16 years' by C Flohr et al published in JAMA Pediatrics

Breastfed babies are less likely to have eczema as teenagers, study shows
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