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Table 4 Multivariate logistic analysis showing associations between mini-implant success and explanatory variables (n = 260)

From: Distance to alveolar crestal bone: a critical factor in the success of orthodontic mini-implants

Associated variables Coef. Std. err. 95% CI p value
  Failure (yes/no) ǂ
Constant 25.684 7.927 [10.148; 41.220] 0.001**
Age − 0.345 0.139 [− 0.618; − 0.073] 0.013*
Gender (male)
 Female 1.841 1.302 [− 0.710; 4.393] 0.157
Site (canine–premolar 1)
 Premolar 1–premolar 2 − 6.180 2.804 [− 11.675; − 0.674] 0.028*
 Premolar 2–molar 1 − 4.919 2.453 [− 9.728; − 0.110] 0.045*
 Molar 1–molar 2 − 1.715 2.421 [− 6.461; 3.030] 0.479
Type (Imtek)
 AbsoAnchor − 2.303 1.493 [− 5.228; 0.623] 0.123
Jaw (maxilla)
 Mandible − 0.008 1.303 [− 2.563; 2.546] 0.995
Side (right)
 Left 0.427 0.974 [− 1.481; 2.335] 0.661
DT 0.558 0.867 [− 1.141; 2.258] 0.519
DC − 3.595 0.855 [− 5.270; − 1.919] < 0.001**
Likelihood ratio χ2 146.45
Degrees of freedom 10
Prob > F < 0.001**
Pseudo R2 0.8074
  1. Age recorded in years; DT and DC recorded in mm
  2. (Base) refers to the base outcome all other categories are compared to
  3. Coef. regression coefficient, Std. err. standard error, DT distance to adjacent root, DC distance to alveolar crest level
  4. *Statistically significant at p < 0.05; **statistically significant at p < 0.01.