Table 4 Multivariable logistic regression analysis showing the association between the presence of untreated additional canals and short-term endodontic failure, adjusted for obturation quality and coronal status

Adjusted for obturation quality, coronal status, and time < 5 years

4.512 (1.5–13.571)

1 (reference)

.007*

Adjusted for obturation quality, coronal status, and time < 4 years

5.428 (1.721–17.124)

1 (reference)

.004*

Adjusted for obturation quality, coronal status, and time < 3 years

6.210 (1.836–21.007)

1 (reference)

.003*

Adjusted for obturation quality, coronal status, and time < 2 years

5.404 (1.453–20.103)

1 (reference)

.012*

Adjusted for obturation quality, coronal status, and time < 1 year

6.070 (1.474–24.992)

1 (reference)

.013*