Table 5 Associations between mentors’ satisfaction and predictor variables by multivariate multilevel linear regression analysis Dependent variable: Mentors’ satisfaction, derived from the question “If you consider the totality of your experience of being a mentor, how do you like it?”

Intercept

3.950

< 0.001

[2.988, 4.911]

Age

9.813E-6

1.000

[0.080, 0.080]

Gender

Female = 1, Male = 2

0.134

0.115

[-0.033, 0.301]

Whether the mentors were recruited voluntarily or mandatory

1: I volunteered, 2: I was strongly urged, 3: It is mandatory in my job

-0.048

0.517

[-0.194, 0.098]

Years of experience as a mentor

0: <5 years, 1: 5–9 years, 2: =>10 years

0.003

0.948

[-0.103, 0.110]

The program’s expectations are unclear

1: Strongly disagree to 5: Strongly agree

-0.046

0.381

[-0.150, 0.058]

It is difficult to fulfil the program’s expectations

1: Strongly disagree to 5: Strongly agree

-0.042

0.408

[-0.143, 0.058]

Opinion about the quality of training provided to mentors

1: Very poor to 5: Very good

-0.003

0.971

[-0.145, 0.140]

Opinion about the quality of the written material provided to mentors

1: Very poor to 5: Very good

-0.085

0.225

[-0.224, 0.053]

The students seem to find the group meetings valuable*

1: Strongly disagree to 5: Strongly agree

0.186

0.027

[0.021, 0.351]

The students have lots of ideas for group discussions

1: Strongly disagree to 5: Strongly agree

0.037

0.436

[-0.056, 0.130]

‘Engaging mentor approach’

Factor containing six items that illustrates an engaging way to be a mentor

0.036

0.450

[-0.058, 0.129]

‘Perceived rewards’*

Factor containing six items that highlight potential rewards of being a mentor

0.330

< 0.001

[0.224, 0.437]

‘Perceived student resistance’

Factor containing three items that describe students’ resistance in the groups

-0.063

0.240

[-0.169, 0.043]