Environmental tobacco smoke and child health
The recent study by Tong, England and Glantz (1) adds to the very
substantive existing scientific evidence around the hazard posed by second
-hand smoke (SHS) to child health. The public health case for widespread
government action to enact restrictions against pregnant women smoking in
general and children’s exposure to second-hand smoke is now extremely
strong.
Using National Household Survey on Drug Abuse (NHSDA) estimates of
substance use during pregnancy, the approximate numbers of births in 1999
complicated by maternal use of illicit drugs, tobacco, and alcohol were
134,110; 694,220; and 544,330, respectively. (2) Thus, from the public
health perspective, the impact of substance use during pregnancy extends
far beyond maternal health to that of a large number of the unborn
population.
SHS is a real and substantial threat to child health; causing death
and suffering throughout the world. (3)The vast majority of children
exposed to tobacco smoke do not choose to be exposed. This involuntary and
harmful exposure can be seen as a human rights violation, given the
provisions of Article 6 and 24 of the 1989 United Nations Convention on
the rights of the Child. (3) Preventing children’s exposure to tobacco
smoke will lead to improved child, adolescent, and ultimately adult
health, resulting in reduced mortality and substantial savings in long
term/short term health care and other direct costs.
Maternal smoking during pregnancy is a major cause of sudden infant
death syndrome (SIDS) and other well-documented health effects, including
reduced birth weight and decreased lung function. (1) SHS exposure among
nonsmoking pregnant women can cause a decrease in birth weight and that
infant exposure to SHS may contribute to the risk of SIDS. The risk of
SIDS is higher amongst babies whose mothers smoke (RR= 4.7) but also
amongst babies living in a house where only the father smokes (RR =1.4).
(4)
The published literature reports a 20% to 30% smoking rate among
pregnant women. (5)Smoking during pregnancy is a significant public health
problem worldwide. Strong public health and legal interventions must be
adopted for the women to stop smoking before pregnancy. A major,
preventable exposure remains for infants throughout the world and health
care providers should redouble counseling efforts toward reducing this
exposure.
As Tong, England and Glantz have suggested clinicians and public
health officials should intensify their efforts to promote reducing infant
exposure to second hand smoking as an effective strategy for reducing
SIDS. (1) Any contact with a woman in the childbearing years must be
viewed as an opportunity for health promotion, health education, positive
behavior reinforcement, and an opportunity to reiterate and follow up on
and reinforce a smoke free message. Despite support from professional
organizations and federal government groups, many pediatricians and family
physicians do not routinely engage in intensive efforts to reduce
children's SHS exposure. Training in techniques for reducing tobacco
dependence should be included in professional education programs.
(6)Effective intervention by pediatrics and family physicians in Sweden;
maternal smoking during pregnancy has decreased from 24% to 10% during
1994-2004. (7)
References:
(1). Tong, E.K., England, L., Glantz, S.A., Changing Conclusions on
Secondhand Smoke in a Sudden Infant Death Syndrome Review Funded by the
Tobacco Industry, PEDIATRICS 2005:115;e356-e366
(2). Substance Abuse and Mental Health Services Administration
(SAMHSA): National Household Survey on Drug Abuse (NHSDA) National
Institute of Drug Abuse.
1999.
(3). Desapriya, E.B.R and Nobutada I., Shimizu, S., Political economy
of tobacco control policy on public health in Japan. Japanese Journal of
Alcohol Studies & Drug Dependence 2003:38(1);15-33
(4). Peter B., et al; Smoking and the sudden infant death syndrome:
results from 1993-5 case-control study for confidential inquiry in to
stillbirths and deaths in infancy. BMJ 1996: 313; 195-198
(5). DiFranza JR, Lew RA: Effect of Maternal Cigarette Smoking on
Pregnancy Complications and Sudden Infant Death Syndrome. J Family
Practice 1995:40(4):385-394
(6). Klerman L., Protecting children: reducing their environmental
tobacco smoke exposure. Nicotine Tobacco Res. 2004: 2; 239-253.
(7). Alm B, Wennergren G, Erdes L., et al; [Parents have accepted the
advice on how to prevent sudden infant death] Lakartidningen.
2004:101(14); 1268-70. (Article in Swedish)