Congress logo
Back to Conference page

The 13th World Conference on Tobacco OR Health

Building capacity for a tobacco-free world

July 12-15, 2006, Washington, DC, USA

Friday, July 14, 2006 - 12:00 PM

Expired air carbon monoxide concentration in mothers and their spouses above 5 ppm is associated with decreased fetal growth

Conchita GOMEZ, Midwife, Association Nationale des Sages-femmes Tabacologues Françaises, Centre Hospitalier d'ARRAS, 57 avenue Winston Churchill, ARRAS, 62022, France and Michel DELCROIX, Professor, Nord, Association Perinatalité Prévention Recherche Information, APPRI-EPSM des Flandres, 790, route de Locre, BAILLEUL, 59270, France.

Objective: The relationship between maternal and spouses' expired air CO concentrations (EACO) on fetal growth has not yet been evaluated.

Methods: 856 smoking and nonsmoking pregnant women were followed during their pregnancy. Their EACO was determined in the first trimester and during delivery. The spouses' EACO were also measured at delivery. The main outcome measures was the infants' birth weight. Secondary measures included head circumference, Apgar score and heart rate at delivery. Cord blood fetal carboxyhemoglobin (FCOHb) served as internal control.

Results: Birth weight dose-dependently and significantly decreased with increasing level of maternal (0-5: 3406 ; 32; 6-10: 3048 „b 57; 11-20: 2858 ; 54; >20 ppm: 2739 ; 34 g (p<0.0001) or spouses' EACO (0-5: 3546 ; 25; 6-10: 3484 ; 51; 11-20: 3309 47; >20 ppm: 3190 ; 57 g, p<0.0001). Even the birth weight of newborns whose mother had EACO between 6 and 10 ppm was significantly lower than the birth weight of newborns whose mother had an EACO between 0 and 5 ppm. Spouses' EACO of delivering women with EACO of 0-5 ppm showed similar effect.