Table 3 TTP reliability by important socio-demographic variables

Race

   White

1

   Black

2.33

0.34, 16.18

Current age (years)

0.92

0.76, 1.11

Age at pregnancy attempt (years)

0.69

0.48, 1.01

Ever smoked

   No

1

   Yes

1.78

0.13, 23.52

Smoked at pregnancy attempt

   No

1

   Yes

3

0.25, 35.33

Alcohol at pregnancy attempt

   No

1

   Yes

1.67

0.27, 10.33

Education at pregnancy attempt

   Less than High School

1

   High School or More

0.67

0.11, 3.92

Currently working

   No

1

   Yes

0.96

0.16, 5.64

Pregnancy outcomes

   Live births

1

   Pregnancy loss

1.56

0.12, 20.85

Period of recall

   <= 5 years

1

   > 5 years

21.33

1.8, 251.26

Chronic disease at attempt

   No

1

   Yes

1.78

0.13, 23.52