Table 1: Demographic variables by group ( ).

VariableGI 

Mean (SE)
UC 

Mean (SE)
Total 

Mean (SE)
value

Age24.75 (1.06)23.78 (0.73)24.26 (0.64)0.454
Height5.31 (0.05)5.38 (0.04)5.35 (0.03)0.315
Weight176.56 (6.20)171.49 (7.15)174.03 (4.71)0.594
Number of pregnancies2.89 (0.31)2.37 (0.30)2.63 (0.22)0.236
Weeks pregnant15.53 (0.16)15.32 (0.22)15.43 (0.13)0.446

% ( )% ( )% ( )

Income
 Less than 15,00072% (26)64% (23)68% ( )0.617
 Between 15,000 and 44,99925% (9)28% (10)26% ( )
 More than 45,0003% (1)8% (3)5% ( )
Marital status
 Married/married before17% ( )11% ( )14% ( )0.496
 Single never married83% )89% ( )86% ( )
Employment
 Full-/part-time job39% ( 39% ( )39% ( )0.924
 No Job58% ( )61% ( )60% ( )
Education
 High school or less47% ( )50% ( )49% ( )0.896
 Posthigh school36% 39% ( )37% ( )
 Postcollege17% ( )11% ( )14% ( )
Drink alcohol
 No86% )97% ( )92% ( )0.199
 Yes14% ( )3% ( )8% ( )
Smoking
 No75% ( )89% ( )82% ( )0.220
 Yes25% ( )11% ( )18% ( )
Beverages w/caffeine
 No22% ( )36% ( )29% ( )0.195
 Yes78% ( )64% ( )71% ( )
Use stress management
 No80% 89% ( )85% ( )0.343
 Yes20% ( )11% ( )15% ( )