Table 3 Summary of the results of the item and scale modalities analysis (Rasch and Partial Credit Model analyses) of the French Generic Adherence for Chronic Diseases Profile (GACID-P) optimized dimensions

Limitation of risk-related consumer habits (PSI = 0.66)

(PSI = 0,66)

Q25

I limit the amount of fat I take

0.03

0.09

-1.10

0.17

Q26

I limit the amount of sugar I take

0.08

0.08

-0.96

0.11

Q27

I limit the amount of salt I take

-0.03

0.08

-1.55

0.01

Q28

I limit the amount of alcohol I drink

-0.54

0.08

2.72

< 0.001

QF29

I am smoking less (for smokers)

0.46

0.21

0.95

0.92

Healthy lifestyle (PSI = 0.29)

Q23

I have regular physical activity, suited to my state of health

0.53

0.07

-0.58

0.05

Q24

I have a healthy, balanced diet

-0.38

0.09

0.85

0.50

Q30T

I allow myself sufficient resting periods (working)

0.16

0.13

0.45

0.78

Q30NT

I allow myself sufficient resting periods (not working)

-0.31

0.09

1.28

0.38

Forgetting to take medication (PSI = 0.11)

Q6b

I sometimes take less than the prescribed dose of medication

0.04

0.19

2.30

0.25

Q8

There are some medications that I forget to take more than others

-0.25

0.18

2.29

0.79

Q9

I sometimes forget my morning medication

0.24

0.21

0.31

0.45

Q10

I sometimes forget my midday medication

0.42

0.22

0.40

0.50

Q12

I sometimes forget my evening medication

-0.43

0.19

1.37

0.22

Q13

I sometimes forget my medication over the week-end

0.23

0.20

-1.87

0.002

Q14

I sometimes forget my medication while on vacation

-0.26

0.20

0.04

0.35

Intention to comply with treatment (PSI=-0.38)

Q2

I take only part of my prescribed medications

1.09

0.17

1.43

0.68

Q3

I take my medication at the prescribed times

1.76

0.15

2.91

0.63

Q4

I comply with the doses prescribed

-0.71

0.25

-2.21

0.01

Q5

I comply with my doctor’s prescription for how many times a day to take my medication

and how many days to take my medication

-0.09

0.21

-1.56

0.06

Q6

I sometimes change the dose of my medication

0.55

0.18

-1.15

0.04

Q17

I take my medication for the duration prescribed by my doctor

0.90

0.16

-0.33

0.41

Q19

I go for the tests prescribed by my doctor (blood, urine tests etc.)

-1.50

0.34

-0.75

0.33

Q20

I go for the x-ray examinations prescribed by my doctor

-0.72

0.25

-0.83

0.43

Q21

I attend appointments with my generalist doctor

-0.14

0.21

-0.67

0.16

Q22

I attend appointments with my specialist doctor

-1.15

0.30

-1.87

0.14