If you are planning to start motherhood, quit smoking, say researchers. Exposing your baby to tobacco smoke during pregnancy or after the birth may cause hearing impairment in them.
According to the researchers, babies who were exposed to smoking during pregnancy had a 68 per cent increased relative risk of developing hearing problems.
“This study clearly shows that preventing exposure to tobacco smoke during pregnancy and postnatally may reduce the risk of hearing problems in children,” said Koji Kawakami from the Kyoto University in Japan.
The study, published in the journal Pediatric and Perinatal Epidemiology, included data from 50,734 children aged 3 years.
Out of the group, 3.8 per cent were exposed to smoking only during pregnancy, 3.9 per cent were exposed only to second-hand smoke at 4 months and 0.9 per cent were exposed to tobacco smoke during pregnancy and at 4 months.
The results showed that the prevalence of hearing impairment among babies aged three who were exposed to smoke was 4.6 per cent while those exposed to only second-hand smoke at 4 months had a 30 per cent increased relative risk.
If you quit smoking cigrattes and gain weight, it may seem like you’re trading one set of health problems for another. But a new U.S. study finds you’re still better off in the long run.
Compared with smokers, even the quitters who gained the most weight had at least a 50 percent lower risk of dying prematurely from heart disease and other causes, the Harvard-led study found.
The study is impressive in its size and scope and should put to rest any myth that there are prohibitive weight-related health consequences to quitting cigarettes, said Dr. William Dietz, a public health expert at George Washington University.
“The paper makes pretty clear that your health improves, even if you gain weight,” said Dietz, who was not involved in the research. “I don’t think we knew that with the assurance that this paper provides.”
The New England Journal of Medicine published the study Wednesday. The journal also published a Swedish study that found quitting smoking seems to be the best thing diabetics can do to cut their risk of dying prematurely.
10 pounds or more
The nicotine in cigarettes can suppress appetite and boost metabolism. Many smokers who quit and don’t step up their exercise find they eat more and gain weight — typically less than 10 pounds (4.5 kilograms), but in some cases three times that much.
A lot of weight gain is a cause of the most common form of diabetes, a disease in which blood sugar levels are higher than normal. Diabetes can lead to problems including blindness, nerve damage, heart and kidney disease, and poor blood flow to the legs and feet.
In the U.S. study, researchers tracked more than 170,000 men and women over roughly 20 years, looking at what they said in health questionnaires given every two years.
The people enrolled in the studies were all health professionals, and did not mirror current smokers in the general population, who are disproportionately low-income, less educated and more likely to smoke heavily.
The researchers checked which study participants quit smoking and followed whether they gained weight and developed diabetes, heart disease or other conditions.
Quitters saw their risk of diabetes increase by 22 percent in the six years after they kicked the habit. An editorial in the journal characterized it as “a mild elevation” in the diabetes risk.
Studies previously showed that people who quit have an elevated risk of developing diabetes, said Dr. Qi Sun, one the study’s authors. He is a researcher at the Harvard-affiliated Brigham and Women’s Hospital.