Background:

Unlike developed countries, data from the developing world regarding motor developmental disorders is scarce.

Objectives:

In the present study, we used the Infant Neurological International Battery (Infanib) test to determine the prevalence of motor impairment in 4-18 month-old infants in Alborz province, Iran, in 2010.

Patients and Methods:

This study was a descriptive-analytic study performed on 6150 infants in Iran. The sample was recruited by convenience sampling from all 4-18 month-old children attended healthcare centers in different districts of Alborz province. Sampling was continued until reaching the desired sample size.

Results:

The sample included 3129 boys and 3021 girls. There was no significant difference between the scores of girls and boys (P = 0.403). The number of children with motor developmental abnormality varied depending on the considered cut-off points. In normative cut-off points, 3.7% had motor disorder, whereas based on the Iranian cut-off points, it was 6.5%.

Conclusions:

Providing an early detection and intervention system is an urgent public health problem due to the prevalence of motor developmental delay in infants living in Alborz province, because it indicates that most infants had been previously undiagnosed and untreated.