Table 3.

Children’s performance ($\text{mean}\pm \text{SD}$) at the 1- and 2-y visits on the Bayley Scales of Infant Development (3rd edition), VHEMBE study, Limpopo, South Africa.

BSID Measures	$\text{Mean}\pm \text{SD}$
At 1-y visit ($n=689$)
Cognitivea	$8.7\pm 2.0$
Receptive Communication	$7.0\pm 1.8$
Expressive Communication	$11.2\pm 2.0$
Fine Motor	$9.2\pm 2.3$
Gross Motor	$9.0\pm 2.8$
Language Composite	$94.9\pm 8.8$
Motor Composite	$94.7\pm 12.2$
Social-Emotional	$8.3\pm 3.1$
At 2-y visit ($n=681$)
Cognitivea	$5.7\pm 1.6$
Receptive Communication	$7.7\pm 1.8$
Expressive Communication	$9.1\pm 2.5$
Fine Motor	$10.3\pm 2.0$
Gross Motor	$7.2\pm 1.7$
Language Composite	$90.8\pm 11.3$
Motor Composite	$92.6\pm 9.0$

Note: BSID, Bayley Scales of Infant Development (3rd edition); VHEMBE, Venda Health Examination of Mothers, Babies and their Environment.

^aCognitive scaled scores can be converted to Cognitive Composite scores standardized to a mean of 100 and SD of 15. The Cognitive Composite score at the 1-y visit had a $\text{mean}\pm \text{SD}\text{of}93.6\pm 9.9$) and at the 2-y visit, $78.7\pm 8.1$.