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Table 4 Criteria of hearing loss missing one of eight tones at 25 dB (total of four possible in each ear) before and after one chiropractic manipulative visit. All patients classified as hearing impaired before.

From: Improvement in hearing after chiropractic care: a case series

  PRE POST CHANGE
Gender/Age Right Left Right Left Right Left
F/67 0 1 2 4 +2 +3
F/65 2 2 2 2 NC
M/71 0 1 0 1 NC
M/49 2 2 2 2 NC
M/34 1 2 2 2 +  
F/61 2 1 1 1 +  
M/48 2 1 3 2 + +
M/37 2 2 2 2 NC
M/38 1 2 2 3 + +
M/57 0 1 2 2 +2 +1
M/71 2 0 2 1 +1  
F/56 0 1 1 1 +1  
F/64 0 0 1 2 +1 +2
M/51 2 1 2 2 +1  
M/41 1 2 2 2 +1  
TOTAL 17 19 26 29 +9 +10
  1. NC = No Changep