Table 4. Associations between BSID-III composite and the WPPSI III Full scale, Verbal and Performance IQ scores at 4 years in the cohort (N = 1233).
| Full Scale IQ | Single independent variable analysis | Adjusted multiple regression analysis Combined explained (R2 = 0.15) | |||||
|---|---|---|---|---|---|---|---|
| coef. | 95% CI | p | R2 | coef. | 95% CI | p | |
| BSID Cognitive scale score | .18 | .15 .21 | <0.001 | .12 | .08 | .04 .12 | <0.001 |
| BSID Language scale score | .20 | .17 .23 | <0.001 | .13 | .11 | .06 .15 | <0.001 |
| BSID Motor scale score | .15 | .13 .18 | <0.001 | .12 | .04 | .01 .08 | .022 |
| Verbal IQ | Combined explained (R2 = 0.16) | ||||||
| coef. | 95% CI | p | R2 | coef. | 95% CI | p | |
| BSID Cognitive scale score | .23 | .19 .26 | <0.001 | .11 | .08 | .04 .14 | .001 |
| BSID Language scale score | .27 | .24 .31 | <0.001 | .13 | .15 | .10 .22 | <0.001 |
| BSID Motor scale score | .21 | .17 .23 | <0.001 | .12 | .06 | .00 .11 | .019 |
| Performance IQ s | Combined explained (R2 = 0.08) | ||||||
| coef. | 95% CI | p | R2 | coef. | 95% CI | P | |
| BSID Cognitive scale score | .16 | .13 .19 | <0.001 | .06 | .08 | .03 .13 | .002 |
| BSID Language scale score | .17 | .13 .21 | <0.001 | .06 | .07 | .01 .13 | .014 |
| BSID Motor scale score | .13 | .11 .16 | <0.001 | .06 | .04 | -.00 .09 | .072 |
Note: BSID = Bayley Scale of Infant Development, CI = Confidence Interval, IQ = Intelligence Quotient, WPPSI = Wechsler Preschool and Primary Scales of Intelligence.