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Table 2 Measured hearing levels in decibel at pure tone averages

From: Cochlea sparing effects of intensity modulated radiation therapy in head and neck cancers patients: a long-term follow-up study

  0.5-1-2 kHz AC mean (SD) median 1-2-4 kHz AC mean (SD) median 8-10-12.5 kHz mean (SD) median 0.5-1-2 kHz BC mean (SD) median 1-2-4 kHz BC mean (SD) median
Number of ears 72 72 67 66 66
Before treatment 20.3 (13.3) 16.7 28.6 (16.8) 25.0 75.4 (23.6) 74.8 17.4 (12.2) 14.1 24.3 (35.1) 20.8
ST after treatment 20.3 (15.4) 15.8 29.2 (18.9) 25.0 78.3 (22.3) 79.0 16.6 (12.7) 13.3 22.9 (15.1) 20.9
LT after treatment 22.1 (15.7) 18.3 31.5 (19.0) 29.2 82.7 (23.3) 82.9 17.3 (12.9) 13.3 23.2 (15.1) 20.0
Difference ST and BT 0 dB 0.6 dB 2.9 dB* −0.8 dB −1.4 dB
Difference LT and ST 1.8 dB 2.3 dB* 4.4 dB* 0.7 dB 0.3 dB
  1. Abbreviations: ST Short-term, LT Long-term, BT Before Treatment, AC Air Conduction, BC Bone Conduction, SD Standard deviation, dB Decibel.
  2. *Statistically significant (p < 0.05).
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