Objective
To determine optimal follow-up time of BAEP for the infants with abnormal BAEP at the initial screening test.

Method
Control group consisted of 85 infants with normal BAEP and experimental group consisted of 41 infants with abnormal BAEP at the first examination but normalized on regular follow-up examinations. Gestational age (correctional age), intrauterine period, birth weight, delivery method, presence of perinatal asphyxia, Apgar score after 1 minute, the highest serum bilirubin level, and the results of cranial ultrasonography were recorded. The above parameters, peak and interpeak latencies of BAEP were compared between both groups.

Results
Lower correctional age at the first BAEP, shorter intrauterine period, and lower birth weight were noted in experimental group (p＜0.001). The average correctional age when BAEP had normalized in experimental group was 45.0⁑5.8 weeks, which was much later than 40.2 ± 2.8 weeks in control group (p＜0.001). 90.2% of infants among experimental group revealed normalized BAEP within 48 weeks, and 95.1% within 51 weeks according to correctional age, or within 12 weeks after initial examination.

Conclusion
We recommend that BAEP should be rechecked after 48 weeks by correctional age for the high risk infants who were abnormal with initial screening BAEP.