Study of degenerative changes of conjunctiva associated with cement industry

This work was conducted to study the effect of exposure to cement on development of degenerative changes on conjunctiva whether directly in industry or indirectly through air pollution. A total sample [3625] were submitted to conjunctival examination; 2051 exposed of 26 non exposed workers, 970 exposed and 340 non exposed inhabitants. The degenerative changes were detected among 87.5% of exposed versus 12.2% of non exposed workers and among 45.6% of exposed versus 11.5% of non exposed inhabitants. The significance of occupational exposure to cement dust on development of degenerative changes of conjunctiva of exposed workers and inhabitants was stressed through comparison between the different studied groups

Some relevant factors which may affect the intelligence quotient [IQ]

The study included 390 children [216 mentaly retarded and 174 control]. It was conducted in El Riyadh City [Saudi Arabia]. Different factors which affect the I.Q level were studied among the two groups, such as, family size, maternal and paternal age, level of education and [Prenatal, perinatal and post natal] risk factors. The maternal age at time of birth and the [Prenatal, natal and post natal] risk factors showed statistical association with I.Q level