Table 3.

Implant subsidence rate and treatment level

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

Key to abbreviations and symbols:

Χ² value of the statistic of the Chi2 test for independence, df degrees of freedom, p two-tailed test probability for Chi2 test statistics;

Underline marks significant associations for p < α = 0.05; α – level of statistical significance; sample size differences are due to missing data