Table 1. Average Pavlov's Ratio at Each Vertebral Level for Each Decade of Life.

Decade of life	C3	C4	C5	C6	Average (C3 to C6)
First (n = 40)	1.08 (0.80–1.41)	1.07 (0.78–1.51)	1.11 (0.83–1.40)	1.13 (0.91–1.34)	1.09
Second (n = 40)	0.97 (0.75–1.41)	0.97 (0.77–1.22)	0.97 (0.57–1.25)	0.98 (0.78–1.20)	0.97
Third (n = 40)	0.94 (0.70–1.27)	0.98 (0.78–1.51)	1.00 (0.73–1.12)	0.98 (0.79–1.32)	0.97
Fourth (n = 40)	0.96 (0.76–1.09)	0.97 (0.88–1.15)	0.99 (0.80–1.45)	0.98 (0.65–1.14)	0.97
Fifth (n = 40)	0.94 (0.72–1.12)	0.94 (0.77–1.14)	0.9 (0.82–1.10)	1.00 (0.85–1.12)	0.96
Sixth (n = 40)	0.97 (0.79–1.18)	0.96 (0.68–1.19)	0.97 (0.84–1.15)	0.98 (0.73–1.22)	0.97
Seventh (n = 40)	0.96 (0.71–1.44)	0.94 (0.61–1.14)	1.00 (0.75–1.38)	0.99 (0.77–1.43)	0.97

Values are ratio (range).