Preterm birth and secondhand smoking during pregnancy: A case–control study from Vietnam

Abstract

Background The relationship between women who are exposed to secondhand smoke and preterm birth is still controversial. The present study aimed to examine the association between maternal secondhand smoking (SHS) during pregnancy and preterm birth. Methods A 1:1 case-control study was conducted at delivery room of The Women's and Children's Hospital of An Giang, Vietnam. A total of 288 cases of preterm birth and 288 controls included in this study. A structured questionnaire in a face-to-face interview was used to assess SHS and potential confounders (maternal age, body mass index, occupation, education level, parity, antenatal care visits, history of preterm birth, prenatal bleeding and preeclampsia/eclampsia). Results SHS was reported more frequently by women who delivered preterm babies compared with women of term deliveries (67.4% vs. 51.0%; P <0.001). After controlling all potential confounders, multivariable logistic regression analysis showed a relationship between SHS during pregnancy and preterm delivery (adjusted Odds ratio: 1.92; 95% CI 1.31, 2.81) Conclusions Our findings suggest that exposure to household tobacco smoke during pregnancy is associated with preterm birth.

Second-Hand Smoking Prevalence in Vietnamese Population Aged 15 and older: A Systematic Review and Meta-Analysis

“… 16 Three surveys utilized a stratified multistage random sampling method to recruit participants and gather demographic data, 12 , 13 , 17 while 2 used convenience sampling, 14 , 18 2 did not specify particular sampling techniques. 15 , 16 Three researches shown both males and females in their analyses, 12 , 13 , 17 100% of participants were pregnant female at hospitals among 3 researches 14 , 15 , 18 , 1 study has not yet provided a sex ratios among non-smokers. 16 …”

“…The remaining 16 full-text publications were evaluated for eligibility and only 7 of these met the eligible research were satisfactory. 12 - 18 …”

“…SHS was defined and age group of subjects was determined in all studies, except only one of the studies 16 (in most cases, it was more than 15 years of age, except for 1 case 16 in which age was higher than 19 years due to this article combine 10 to 19-yearold into a subgroup and this group age was eliminated since non-conformance with our selection criteria). The study region also varied, with 6 research investigating both urban and rural areas, [12][13][14][15]17,18 while the other 1 study did not offer this figure. 16 Three surveys utilized a stratified multistage random sampling method to recruit participants and gather demographic data, 12,13,17 while 2 used convenience sampling, 14,18 2 did not specify particular sampling techniques.…”

Prenatal second-hand smoke exposure and the risk of suspected developmental coordination disorder in preschoolers: A nationwide retrospective cohort study in China

“…Previous research has found that prenatal exposure of the human fetus to SHS has been epidemiologically linked to preterm birth, reduced birth weight, enhanced susceptibility to respiratory diseases, and changes in immune response ( 10 , 12 , 33 , 34 ). Moreover, studies have also shown a relationship between SHS exposure during pregnancy and neurodevelopment in children.…”

“…Prenatal SHS exposure has also been associated with poorer physical outcomes for infants and children including low birth weight ( 10 , 11 ), preterm birth ( 12 , 13 ), and asthma ( 14 , 15 ). Over recent years, a growing number of studies have demonstrated that the negative impact of prenatal SHS exposure extends beyond the physical health of infants to mental health and neurodevelopmental disorders, such as attention deficit hyperactivity disorder (ADHD) ( 16 ), behavioral problems ( 17 , 18 ), language difficulties ( 19 ), and learning disabilities ( 20 ).…”