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. Author manuscript; available in PMC: 2019 Feb 1.
Published in final edited form as: Hum Reprod Open. 2018 Feb 20;2018(2):hoy001. doi: 10.1093/hropen/hoy001

Table 2.

Characteristics from 799 women and 487 men (447 couples) participating in the Environment and Reproductive Health (EARTH) Study from 2004 – 2017.

Characteristic Women N=799 Men N=487

Age (years)
Mean (SD) 34.7 (4.5) 36.6 (5.4)
Age>35, n (%) 345 (43) 273 (56)
Race, n (%)
White 651 (81) 419 (86)
Black 39 (5) 15 (3)
Asian 71 (9) 34 (7)
Other 38 (5) 19 (4)
Body Mass Index (BMI, Kg/m2)
Mean (SD) 24.6 (4.9) 27.5 (4.5)
BMI >25, n (%) 283 (35) 346 (71)
Education, n (%)
< College 60 (8) 55 (11)
College Graduate 231 (29) 136 (28)
Graduate Degree 392 (49) 198 (41)
Missing 116 (14) 98 (20)
Smoking Status, n (%)
Never 583 (73) 327 (67)
Former 192 (24) 131 (27)
Current 24 (3) 29 (6)
Primary Infertility Diagnosis, n (%)
Male Factor 196 (24) 146 (30)
Female Factor 285 (36) 166 (34)
Diminished ovarian reserve 90/285
Ovulation disorders 106/285
Endometriosis 36/285
Uterine disorders 11/285
Tubal factor 42/285
Unexplained 318 (40) 175 (36)
Nulliparous at study entry, n (%)
698 (87) -
Live Births, n (%)
Singletons, n (%) 387/563 (69)
Multiples, n (%) 176/563 (31)