Serum Perfluorooctanoic Acid and Perfluorooctane Sulfonate Concentrations in Relation to Birth Outcomes in the Mid-Ohio Valley, 2005–2010

http://dx.doi.org/10.1289/ehp.1206372



Table 1. Study population characteristics by birth and by women.
Characteristic n (%)
aTwo birth records missing gestational age, one ­missing birth weight. bAt time of enrollment. cSelf-reported ­physician-diagnosed diabetes (other than during pregnancy).
Births 1,630
Birth outcome  
Preterm birth (< 37 weeks) 158 (10)a
Low birth weight (< 2,500 g) 88 (5)a
PIH 106 (7)
Maternal age (at conception)  
19–29 years 1,112 (68)
30–34 years 378 (23)
≥ 35 years 140 (9)
Parity  
0 previous live births 570 (35)
≥ 1 previous live birth 1,060 (65)
Year of birth  
2005 413 (25)
2006 322 (20)
2007 328 (20)
2008 272 (17)
2009 184 (11)
2010 111 (7)
Year of conception  
2004 289 (18)
2005 367 (23)
2006 300 (18)
2007 308 (19)
2008 201 (12)
2009 159 (10)
2010 6 (< 1)
Maternal smoking  
Current 452 (28)
Former 394 (24)
Never 784 (48)
Individual women 1,330
Births per woman included in analysis  
1 1,055 (79)
2 250 (19)
3 25 (2)
Education (years)b  
< 12 75 (6)
12 353 (27)
13–15 598 (45)
≥ 16 304 (23)
Body mass index (kg/m3)b  
Underweight < 18.5 41 (3)
Normal 18.5 to < 25 546 (41)
Overweight 25 to < 30 354 (27)
Obese ≥ 30 389 (29)
Diabetes (yes)c 53 (4)