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Table 3 Implant subsidence rate and treatment level

From: Subsidence following cervical discectomy and implant-to-bone ratio

Treatment level

Subsidence

χ2 (df)

p

Yes

n (column %) row %

No

n (column %) row %

C3/C4

1 (2.9) 11.11

8 (6.11) 88.89

8.502 (1)

0.0367

C4/C5

2 (5.71) 12.5

14 (10.7) 87.5

C5/C6

14 (40.0) 15.73

75 (57.3) 84.27

C6/C7

18 (51.43) 34.62

34 (25.95) 65.38

  1. Key to abbreviations and symbols:
  2. Χ2 value of the statistic of the Chi2 test for independence, df degrees of freedom, p two-tailed test probability for Chi2 test statistics;
  3. Underline marks significant associations for p < α = 0.05; α – level of statistical significance; sample size differences are due to missing data