Table 5 Multivariable analysis: Linear regression taking the restrained eating score as the dependent variable

Model 1: sociodemographic variables as independent variables.

 Gender (females vs. males*)

7.02

0.32

< 0.001

4.36–8.68

 Body Mass Index

0.69

0.29

< 0.001

0.51–0.87

 Family history of eating disorders (yes vs. no*)

1.43

0.07

0.083

-0.19-3.05

 Physical activity index

0.08

0.23

< 0.001

0.05–0.10

Nagelkerke R² = 20.2 %

Model 2: sociodemographic variables and practices followed as independent variables.

 Gender (females vs. males*)

5.25

0.24

< 0.001

3.66–6.85

 Body Mass Index

0.49

0.21

< 0.001

0.32–0.67

 Family history of eating disorders (yes vs. no*)

0.74

0.04

0.353

0.83 − 2.32

 Physical activity index

0.06

0.18

< 0.001

0.04–0.08

 Following a diet to lose weight (yes vs. no*)

5.06

0.30

< 0.001

4.22–7.23

 Medication intake to lose weight (yes vs. no*)

-5.06

-0.10

0.004

-5.71- -1.05

 Starving oneself to lose weight (yes vs. no*)

2.95

0.13

0.001

1.06–4.44

 Pressured by media to lose weight (yes vs. no*)

0.36

0.04

0.370

-0.80-2.15

 Weighing yourself daily (yes vs. no*)

2.04

0.10

0.016

-0.39-3.68

Nagelkerke R² = 32.4 %

Model 3: sociodemographic variables, practices followed, mental health variables and body dissatisfaction and self-esteem as independent variables.

 Gender (females vs. males*)

4.82

0.22

< 0.001

3.23–6.41

 Body Mass Index

0.36

0.16

< 0.001

0.18–0.55

 Family history of eating disorders (yes vs. no*)

-0.001

0.001

0.999

-1.55-1.55

 Physical activity index

0.06

0.17

< 0.001

0.03–0.08

 Following a diet to lose weight (yes vs. no*)

4.57

0.24

< 0.001

3.01–6.13

 Medication intake to lose weight (yes vs. no*)

-4.60

-0.14

< 0.001

-7.06- -2.14

 Starving oneself to lose weight (yes vs. no*)

3.00

0.14

0.001

1.26–4.73

 Pressured by media to lose weight (yes vs. no*)

-0.49

-0.03

0.532

-2.05-1.06

 Body dissatisfaction

1.77

0.08

0.031

0.17–3.37

 Self-esteem

0.26

0.18

< 0.001

0.14–0.39

 Anxiety

0.04

0.05

0.324

-0.04-0.12

 Depression

-0.15

-0.09

0.124

-0.33-0.04

Stress

0.33

0.20

< 0.001

0.16–0.50

Nagelkerke R² = 37.4 %

Model 4: sociodemographic variables, practices followed, mental health variables and body dissatisfaction, self-esteem and the interaction of body dissatisfaction with BMI as independent variables.

 Gender (females vs. males*)

4.93

0.23

< 0.001

3.36–6.50

 Body Mass Index

1.14

0.49

< 0.001

0.71-1.57

 Family history of eating disorders (yes vs. no*)

-0.01

0.001

0.989

-1.52-1.54

 Physical activity index

0.05

0.16

< 0.001

0.03–0.08

 Following a diet to lose weight (yes vs. no*)

4.50

0.23

< 0.001

2.95-6.04

 Medication intake to lose weight (yes vs. no*)

-4.73

-0.15

< 0.001

-7.16- -2.30

 Starving oneself to lose weight (yes vs. no*)

3.04

0.14

0.001

1.32-4.76

 Pressured by media to lose weight (yes vs. no*)

-0.42

-0.02

0.591

-1.95-1.12

 Weighing yourself daily (yes vs no*)

1.59

0.08

0.049

0.01-3.18

 Body dissatisfaction

1.43

0.98

< 0.001

0.83-2.03

 Self-esteem

0.21

0.12

0.002

0.07-0.34

 Anxiety

0.04

0.04

0.340

-0.04-0.12

 Depression

-0.13

-0.07

0.179

-0.31-0.06

 Stress

0.31

0.19

< 0.001

0.15-0.48

 Interaction BMI by body dissatisfaction

-0.05

-0.99

< 0.001

-0.08- -0.03

Nagelkerke R² = 39.1 %