Variable

ART
N=76
N (%, 95% CI)

Spontaneous Conception
N=152
N (%, 95% CI)

p-value
(comparison of ART and Spontaneous conception)

Remainder of AOB cohort
N=1,068
N (%, 95% CI)

p-value
(comparison of spontaneous conception and remaining AOB cohort)

Annual Household Income
<$60,000
 ≥$60,000

5 (6.9, 1.0-12.9)
67 (93.1, 87.1-99.0)

23 (15.8, 9.8-21.7)
123 (84.2, 78.3-90.2)

0.07

198 (19.1, 16.7-21.5)
837 (80.9, 78.5-83.3)

0.33

Graduated from trade school/college/university
 Yes
 No

22 (28.9, 18.6-39.3)
54 (71.1, 60.7-81.4)

30 (19.7, 13.3-26.1)
122 (80.3, 73.9-86.6)

0.12

248 (23.3, 20.7-25.8)
818 (76.7, 74.2-79.3)

0.33

Currently working or attending school
 Yes
 No

51 (67.1, 56.4-77.8)
25 (32.9, 22.2-43.6)

91 (62.8, 54.8-70.7)
54 (37.2, 29.3-45.2)

0.52

632 (60.2, 57.2-63.2)
418 (39.8, 36.8-42.8)

0.55

Maternal Age at Delivery
 Mean (standard deviation)
 Range

32.9 (5.2)
23-43

30.8 (4.5)
20-45

0.001

30.8 (4.2)
19-42

0.90

Born in Canada
 Yes
 No

54 (71.1, 60.7-81.4)
22 (28.9, 18.6-39.3)

119 (78.3, 71.7-84.9)
33 (21.7, 15.1-28.3)

0.23

821 (76.9, 74.4-79.5)
246 (23.1, 20.5-25.6)

0.71

Ethnicity
 Caucasian
 Non-Caucasian

55 (72.4, 62.2-82.5)
21 (27.6, 17.5-37.8)

122 (80.3, 73.9-86.7)
30 (19.7, 13.4-26.1)

0.18

811 (76.2, 73.7-78.8)
253 (23.8, 21.2-26.3)

0.27

Marital Status
 Single, Separated, Divorced, Widowed
 Married, Common Law

2 (2.6, -1.0-6.3)
74 (97.4, 93.7-101.0)

6 (4.0, 0.8-7.1)
145 (96.0, 92.9-99.2)

0.72

63 (5.9, 4.5-7.3)
1002 (94.1, 92.7-95.5)

0.33

First Pregnancy
 Yes
 No

31 (40.8, 29.6-52.0)
45 (59.2, 48.0-70.4)

57 (37.7, 29.9-45.5)
94 (62.2, 54.5-70.1)

0.66

399 (37.4, 34.5-40.3)
668 (62.6, 59.7-65.5)

0.93