Table 3 Univariate and multivariate logistic regression analysis for competence of senior residents in finishing IBT independently

Workload of brachytherapy in training unit(cases/year)

0.998(0.997–0.999)

0.003

0.999(0.998-1.000)

0.020

IBT cases performed by residents

≤ 20

ref

ref

> 20

11.373(1.423–90.867)

0.022

7.603(1.647–35.099)

0.009

IBT cases observed by residents

≤ 20

ref

> 20

9.623(2.124–43.604)

0.003

Cases cared by residents

≤ 20

ref

> 20

1.384(0.683–2.804)

0.366

MRI images analyzed by residents

≤ 20

ref

> 20

1.300(0.644–2.624)

0.464

papers about brachytherapy read by residents

≤ 10

ref

> 10

1.552(0.766–3.145)

0.223

Residents attending brachytherapy curriculum

No

ref

Yes

1.692(0.845–3.391)

0.138

Residents with or without interesting for brachytherapy

Without

ref

With

0.716(0.272–1.886)

0.499

Residents attending academic activities (times)

≤ 2

ref

>2

1.044(0.526–2.071)

0.903

Residents taking brachytherapy very serious

No

ref

Yes

1.729(0.279–10.701)

0.556