Table 4 Results nested logistic regression analyses for 5 preference statements for which confounders influence the relationship between age and preference score

Preference statement 36: GP must redirect me to a medical specialist when I think it is necessary

Reference category 51–75 years

Model 1

75 years and older

0.97

0.2

0.87

0.65

1.44

30-51 years

0.72

0.1

0.02

0.55

0.95

0-30 years

0.7

0.13

0.05

0.49

1

Model 2

75 years and older

0.9

0.18

0.61

0.6

1.35

30-51 years

0.77

0.11

0.06

0.58

1.02

0-30 years

0.72

0.13

0.08

0.5

1.04

Gender

0.93

0.12

0.58

0.73

1.19

Education

0.81

0.07

0.02

0.68

0.96

Preference statement 57: The OHCP* must assist me to prevent diseases or to improve my health

Reference category 0–30 years

Model 1

75 years and older

0.9

0.26

0.7

0.51

1.57

51-75 years

1.57

0.31

0.03

1.06

2.33

30-51 years

0.94

0.2

0.77

0.62

1.42

Model 2

75 years and older

0.76

0.22

0.35

0.43

1.35

51-75 years

1.46

0.3

0.07

0.98

2.17

30-51 years

0.97

0.21

0.9

0.64

1.48

Gender

1.14

0.16

0.35

0.87

1.49

Education

0.73

0.07

0

0.6

0.89

Preference statement 59 The OHCP must pay attention to emotional problems

Reference category: 0–30 years

Model 1

75 years and older

0.87

0.29

0.68

0.45

1.67

51-75 years

1.71

0.39

0.02

1.09

2.68

30-51 years

1.1

0.26

0.69

0.7

1.76

Model 2

75 years and older

0.69

0.23

0.28

0.36

1.34

51-75 years

1.57

0.36

0.05

1

2.47

30-51 years

1.16

0.28

0.54

0.72

1.86

Gender

0.99

0.15

0.97

0.74

1.34

Education

0.64

0.07

0

0.51

0.79

Preference statement 62: The OHCP must collaborate well with GP

Reference category 51–75 years

Model 1

75 years and older

0.7

0.13

0.047

0.49

0.99

30-51 years

0.97

0.12

0.82

0.77

1.23

0-30 years

0.96

0.15

0.78

0.71

1.3

Model 2

75 years and older

0.74

0.13

0.1

0.52

1.06

30-51 years

0.9

0.11

0.39

0.7

1.15

0-30 years

0.91

0.14

0.53

0.67

1.23

Gender

0.91

0.09

0.4

0.74

1.13

Education

1.23

0.1

0.01

1.07

1.43

Preference statement 63: The OHCP must not give conflicting information

Reference category 0–30 years

Model 1

75 years and older

0.66

0.12

0.02

0.46

0.95

51-75 years

0.91

0.11

0.43

0.71

1.16

30-51 years

0.95

0.15

0.73

0.7

1.29

Model 2

75 years and older

0.75

0.14

0.12

0.52

1.08

51-75 years

0.98

0.12

0.86

0.76

1.25

30-51 years

0.97

0.15

0.84

0.71

1.32

Gender

0.89

0.1

0.27

0.72

1.1

Education

1.2

0.09

0.01

1.04

1.4