Table 2.

The number of infants in which the I–V interval is mildly prolonged [by one standard deviation (≥0.4 ms; <0.8 ms)] or severely prolonged [by two standard deviations (≥0.8 ms)] are presented

	I–V interval mildly prolonged (≥0.4 ms; <0.8 ms)	I–V interval severely prolonged (≥0.8 ms)
Both ears	1	3a
Right ear	3	1
Left ear	7	1
Total	11	5

^aOne infant had a mildly prolonged I–V interval (≥0.4 ms; <0.8 ms) in the left ear and a severely prolonged I–V interval (≥0.8 ms) in the right ear and has been classified in the severely prolonged group based on the worst ear