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Table 3 Bivariate analysis between maternal characteristics, education variables and gestational age (week) (N = 763)*

From: Academic performance, educational aspiration and birth outcomes among adolescent mothers: a national longitudinal study

  Black (n = 244) Non-black (n = 519) P-value for interaction
  Β(se) P Β(se) P
Baseline age 0.18(0.10) 0.08 0.01(0.08) 0.87 0.20
Age at pregnancy −0.05(0.10) 0.60 −0.07(0.09) 0.43 0.86
Baseline BMI category   0.68   0.47 0.94
Underweight 0.31(0.36)   −0.09(0.27)   
Normal weight ref   ref   
Over weight 0.18(0.43)   −0.03(0.46)   
Obese −1.60(2.10)   0.54(0.37)   
Parental education   0.16   0.27 0.08
≥HS ref   ref   
Less than HS 0.54(0.38)   −0.35(0.32)   
Educational aspiration standardized −0.07(0.19) 0.71 0.09(0.11) 0.39 0.44
GPA   0.54   0.62 0.42
Below average −0.25(0.41)   0.14(0.28)   
Above average ref   ref   
Ever skipped a grade   0.95   <0.01 0.29
No ref   ref   
Yes −0.06(0.88)   0.95(0.32)   
Ever repeated a grade   0.29   0.38 0.18
No ref   ref   
Yes 0.36(0.33)   −0.28(0.32)   
Smoking during pregnancy   0.01   0.53 0.08
No ref   ref   
Yes 0.92(0.36)   0.14(0.21)   
Initiation of prenatal care   0.16   0.10 0.95
1st trimester ref   ref   
2nd trimester 0.66(0.38)   0.55(0.25)   
3rd trimester or no prenatal care −0.01(0.61)   0.28(0.46)   
  1. *Figures presented are regression coefficients with standard errors.