Cerebral palsy is the most common physical disability among children, with about two per 1000 live-born infants being diagnosed with the disorder. In most children with cerebral palsy, the disability is caused by damage to the immature brain during pregnancy or birth that results in problems with movement.
Denmark and Norway have low income inequality and free access to education and offer high-quality antenatal care to pregnant women free of charge. Nevertheless, in our study recently published in the International Journal of Epidemiology, we found that the risk of having a child with cerebral palsy in these two countries varies by the parents’ educational level, and this educational gradient has been surprisingly stable over time.
The Obstetrics and Periodontal Therapy (OPT) Study was an NIH-funded randomised controlled trial designed to evaluate whether periodontal treatment in pregnant women had any effect on preterm birth; its findings were published in 2006. The investigators randomly assigned about 800 women who had been pregnant for less than 16 weeks, and had periodontal disease, to one of two groups. One group received periodontal treatment during pregnancy, whereas the other group received treatment after pregnancy.
Although the study found that treatment controlled periodontal infection and reduced the microorganism load, there was no difference in preterm birth rates between the two groups. The investigators concluded that treating periodontal disease during pregnancy did not affect the risk of preterm birth. However, they also found that there were more stillbirths in the group that received treatment after pregnancy, suggesting that periodontal treatment may improve survival of fetuses. The potential bias resulting from the intervention affecting both the outcome (in this case, preterm birth) and survival (in this case, stillbirth) was acknowledged as a limitation.
Childhood overweight and obesity are a global public health problem. In high-income countries, obesity follows socioeconomic patterns, in that people with a lower socioeconomic position are more likely to be overweight or obese than those with a higher socioeconomic position. Poor diet is a key risk factor for excess weight gain. It is also a risk factor that we can do something about.
Reducing child mortality remains one of the key objectives of the Sustainable Development Goals. Remarkable progress has been made over the past 25 years, with the global number of deaths of children aged under 5 falling from 13 million in 1990 to six million in 2015. Yet little is known about the relative contributions of specific public health interventions and general improvements in socioeconomic status and educational attainment over the same period.
Johanna Metsälä, Jaakko Nevalainen and Suvi M Virtanen
Traditionally, asthma and type 1 diabetes have been considered distinct immune-mediated diseases in which the underlying immune responses counteract each other, resulting in an inverse association between the diseases. In our study, recently published in the IJE, we explored the association between asthma and type 1 diabetes in childhood in a novel way, and observed that the direction of the association is dependent on the order of appearance of the diseases.
Tanja AJ Houweling, David Osrin, Kishwar Azad, Dharma S Manandhar, Prasanta Tripathy, Tambosi Phiri, Joanna Morrison and Anthony Costello
In low- and middle-income countries, the odds of surviving the first 28 days of life are grossly unequal between infants born in deprived and better-off families, even among children living in the same community. In our study, recently published in the IJE, we have shown that women’s groups are able to address this problem. Under the guidance of a facilitator, women came together every month to discuss problems during pregnancy, delivery and the newborn period, and then designed and implemented strategies to overcome these problems with the help of the entire community.
Eleonora Uphoff, Neil Small, Rosie McEachan and Kate Pickett
For some years, our research has been based in the city of Bradford in northern England. We are often asked to justify our research setting. There seems to be a concern that a cohort population that is not representative of the nation as a whole or of the ‘average person’ cannot produce valuable insights beyond its local setting.
While such concerns are not new, they now seem more present, perhaps due to the rise of Big Data or the increased sharing of and access to data from national surveys and cohorts. Do these reservations represent a push for representativeness and generalisability in epidemiology? If so, this might come at the expense of research aiming to paint a more detailed picture of population health.
Vicente Martínez-Vizcaíno, Celia Álvarez-Bueno and Iván Cavero-Redondo
Our study, recently published in the IJE, looks at the relationship between pre-gestational weight status and children’s neurodevelopment. It shows that children born to mothers who were normal weight before pregnancy scored better on cognition tests than children born to obese women. An original aspect of our study is that it summarises the evidence provided by 15 previous follow-up studies, including samples from seven different countries, and provides information for both cognition tests and general intelligence scores.
Cecilie Svanes, Jennifer Koplin, Francisco Gomez Real, and Svein Magne Skulstad
A new study shows that asthma is three times more common in those who had a father who smoked in adolescence, and twice as common in those whose father worked with welding before conception. Can these numbers be reduced by including adolescent boys in public health prevention programmes?
It is well known that a mother’s environment plays a key role in child health. The hypothesis that health and disease originate early in life has dramatically increased our understanding of this issue. However, recent research suggests that this may also be true for fathers; i.e. father’s lifestyle and age appear to be reflected in molecules that control gene function. There is growing evidence from animal studies for “epigenetic” inheritance, a mechanism whereby the father’s environment before conception could impact on the health of future generations. Continue reading “Does fathers’ smoking give their future offspring asthma?”→