Overweight among Four-Year-Old Children in Relation to Early Growth Characteristics and Socioeconomic Factors

Table 3

(a) Analysis of continuous variables as predictors for body mass index standard deviation score (BMISDS): univariate correlations and outcomes of linear multiple regression analysis for the model BMISDS  =  CHC, birth weight and birth BMI.

	BMISDS
	Univariate =  $R$-value	$P$-value	Beta-value at
			linear multiple
			regression
			analysis
CHC	0.12${}^{*}$	.03	0.35
Birth weight	0.24${}^{*}$	$<$.001	Ns
Birth length	—	.08	—
Birth BMI	0.27${}^{*}$	$<$.001	0.18
Smoking rate of mothers during pregnancy	—	Ns
Duration of breastfeeding	—	Ns
Gender	—	Ns

${}^{*}$ included in multiple linear regression model

(b) Analysis of categorical variables as predictors for overweight at 4 years of age: results of a stepwise multiple logistic regression analysis for the model overweight (including the obese)  =  dichotomised CHC and birth BMI.

Overweight (including the obese)
	Stepwise logistic regression analysis
	OR	95% CI	$P$-value
CHC-dA  =  2 CHC-dB  =  1	2.6	1.2–5.8	.02
Birth weight	—	—	—
Birth length	—	—	—
Birth BMI${}^{**}$	1.9	1.1–3.6	.03
			—
			—
			—

${}^{*}$included in multiple linear regression model OR:  Odds Ratio CI:  Confidence Intervals ${}^{**}$Birth BMI:  Dichotomised at the median (13.6 kg/m²)