About 4 to 15 percent of those with the syndrome have intellectual deficits, mostly mild but sometimes moderate retardation, he said.

Neurological signs include poor muscle control and moderate mental retardation.

Microcornea, microphthalmia and mild or moderate mental retardation may accompany these features.

About 3 in 1,000 people suffer from moderate or severe mental retardation.

There may be mild or moderate retardation.

Children may have moderate mental retardation and learning difficulties.

In these settings, the role of a lack of stimulation has often been evidenced in the development of mild and moderate mental retardation.

Acrodysostosis is usually accompanied by moderate mental retardation and learning difficulties.

It is now usually subdivided into two categories, known as severe mental retardation and moderate mental retardation.

In many areas, these terms have been replaced by use of "moderate" and "severe" mental retardation.