Table 7.

Significant Predictors of the Bayley Scales of Infant Development^a

	Raw Beta	Standardized Regression Coefficient
Mental Development Index (MDI) (Total R2 = .31)
Child age at assessment	−2.32	−.36
Adequacy of the BSIDb	−13.70	−.22
Developmental stimulationc	.83	.21
Raced	4.60	.14
Prenatal alcohol use
1st trimester	−3.78	−.14
3rd trimester	−5.70	−.12
Man in householde	−3.92	−.12
Number of children in household	−1.48	−.10
Psychomotor Development Index (PDI) (Total R2 =.13)
Child age at assessment	−1.25	−.20
Prenatal alcohol use
1st trimester	−4.28	−.17
2nd trimester	−7.19	−.16
3rd trimester	−6.24	−.13
Prenatal cocaine use
2nd trimester	−7.32	−.12
Number of children in household	−1.69	−.11
Infant Behavior Record (IBR) Task (Total R2 = .04)
Number of hospitalizations	.71	.13
Current maternal marijuana use	−1.36	−.13
Affect (Total R2 = .02)
Prenatal marijuana use
1st trimester	−1.22	−.13
2nd trimester	−4.37	−.17
3rd trimester	−2.82	−.13
Activity (Total R2 = .03)
Child age at assessment	.15	.17

^aListed in order of standardized regression coefficient, an indication of the magnitude of the effect.

^bIBR judgement of test as being indicator of child’s characteristics (0=average to excellent; 1 = minimal or fairly adequate)

^cPROCESS Scale [18]

^d0=African American; 1=Caucasian

^e0=not present; 1=present