Table 3 Correlation coefficient between external auditory canal morphology and middle ear structure
From: Morphological relationships between external auditory canal and vital structures of tympanic cavity
| Â | Antero-posterior length of TM(g) | Superio-inferior length of TM(h) | Angle of ACOH(i) | Angle of PCOH(j) | Angle of ICOH(k) |
|---|---|---|---|---|---|
[Sinus tympani] | Â | Â | Â | Â | Â |
  Average Class | 0.43 | 0.23 | 9.74 × 10− 3 | 5.76 × 10− 2 | 0.35 |
  Posterior depth(a) | 0.42 | 0.12 | 8.11 × 10− 2 | -2.41 × 10− 2 | 0.34 |
  Lateral depth(b) | 0.24 | 0.22 | 5.03 × 10− 2 | 9.41 × 10− 2 | 0.13 |
[Vertical portion of facial nerve] | Â | Â | Â | Â | Â |
  Posterior length from EAC(c) | 7.01×0.0− 2 | 1.85 × 10− 3 | 0.18 | 9.26 × 1.0− 2 | -5.79 × 10− 2 |
  Lateral length from TM(d) | -0.31 | -0.15 | 8.67 × 10− 2 | 1.95 × 10− 2 | -0.43 |
[High jugular bulb] | Â | Â | Â | Â | Â |
  Average Class | -3.09 × 10− 2 | -0.19 | 2.41 × 10− 3 | 3.87 × 10− 2 | 3.87 × 10− 2 |
  Horizontal length from ITM(e) | 1.61 × 10− 2 | 8.8 × 10− 2 | 0.1 | 0.12 | 6.63 × 10− 2 |
  Vertical length from ITM(f) | 9.35 × 10− 2 | -0.29 | 0.13 | -8.49 × 10− 3 | -5.47 × 10− 2 |