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Table 2 Estimates from univariate regression analysis (independent association between predictor variables and failed implants)

From: Failure rates of mini-implants placed in the infrazygomatic region

Predictor variable

Estimate

Odds ratio

p value

Age

<18 years

−0.1182

0.89

0.86

≥18 years

Reference

Gender

Female

−1.1383

0.32

0.11

Male

Reference

Presence of medical condition

Yes

1.50

4.48

0.14

No

Reference

Lomas (Mondeal, Tuttligen, Germany)

Yes

−0.7983

0.45

0.31

No

Reference

Diameter of implant

1.50 or 1.80

0.5630

1.76

0.40

2.00 or 2.30

Reference

Length of implant

6 to 8 mm

0.7078

2.03

0.37

9 mm

Reference

Force

150 g

−0.4282

0.65

0.59

>150 g

Reference

Type of movement

Purely intrusive

−0.6377

0.53

0.34

All others

Reference

Oral hygiene

Poor

1.0269

2.79

0.09

Good

Reference

Operator experience

Experienced

−0.3145

0.73

0.6848

Inexperienced

Reference

Use of pilot hole

Yes

−0.8610

0.42

0.32

No

Reference

Side of implant

Left

0.3962

1.49

0.53

Right

Reference