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Table 3 Univariate and multivariate regression models for the outcome “Graft Shrinkage”

From: Clinical and radiographic outcomes following transcrestal maxillary sinus floor elevation with injectable xenogenous bone substitute in gel form: a prospective multicenter study

Number of cases = 71

Univariate analysis

Multivariate analysis

Graft shrinkage

Coeff

[95% CI]

p-value

Coeff

[95% CI]

p-value

Age

− 0.02

[− 0.44–0.40]

0.942

   

Gender

      

 Female

1

  

 Male

− 2.84

[− 13.56–7.88]

0.604

History of periodontitis

      

 Yes

1

  

 No

− 2.19

[− 12.2–7.82]

0.669

Smoking

      

 Yes

1

  

 No

− 11.98

[− 21.88–− 2.08]

0.018*

Residual bone height

− 7.88

[− 18.28–2.52]

0.138

   

Sinus width

      

 Narrow

1

  

 Wide

6.64

[− 12.09–25.37]

0.487

Surgical technique

      

 Osteotomes

1

  

 Burs

− 13.70

[− 26.34–− 1.06]

0.034*

 Piezoelectric tips

11.30

[− 16.62–39.23]

0.428

Implant length

− 5.33

[− 9.97– to 0.69]

0.024*

− 3.60

[− 6.55–0.65]

0.018*

Membrane perforation

      

 Absent

1

  

1

  

 Present

32.06

[10.43–53.69]

0.004*

28.08

[9.25–46.91]

0.004*

Implant insertion

      

 Immediate

1

  

1

  

 Delayed

36.67

[24.66–48.68]

0.000*

25.77

[17.56–33.98]

0.000*

  1. Coeff. coefficient, CI confidence interval, *: p-value < 0.05