Perinatal, neonatal, developmental and demographic predictors of intelligence at 4 years of age among low birth weight children: a panel study with a 2-year follow-up

Table 2 Linear regression modeling

	Model 1	Model 2	Model 3	Model 4
	16 variables from bivariate analysis (Bayley 5 subscales at 2 years separately)	16 variables from bivariate analysis (Bayley 5 subscales at 2 years separately)	12 variables from bivariate analysis (Bayley at 2 years aggregated)	12 variables from bivariate analysis (Bayley at 2 years aggregated)
Regression	linear regression	stepwise backward regression	linear regression	stepwise backward regression
No of significant predictors	1	5	2	4
Adjusted R²	0.5362	0.5491	0.5474	0.5701
RMSE	12.292	12.12	12.144	11.835
F	8.23	25.36	11.08	34.15
p > F	0.0000	0.0000	0.0000	0.0000
AIC	808.8262	796.4019	803.0702	790.6543

AIC Akaike information criterion, BSID Bayley Scales of Infant and Toddler Development, RMSE Root mean square error

ISSN: 1471-2431