Table 1 Interaction of education, income and classification of occupation with quality of life - Physical dimension

None/Primary

26

41,95 (10,86)

15

44,35 (9,49)

11

38,68 (12,18)

Secondary-Lower

56

43,46 (9,37)

26

43,99 (9,09)

30

42,99 (9,74)

Secondary-Upper

191

49,78 (7,02)

104

49,68 (6,83)

87

49,89 (7,28)

Undergraduate

146

53,05 (6,11)

63

53,09 (6,21)

83

53,03 (6,07)

Postagraduate

27

54,89 (5,35)

13

52,63 (6,40)

14

56,99 (3,10)

P-value

< 0,001

< 0,001

< 0,001

Per category increase (95% C.I.)

3,81 (3,08-4,53)

3,04 (2,03–4.05)

4,58 (3,55-5,62)

P for trend

< 0.001

< 0.001

< 0.001

P for interaction

0,16

Income (€)

Ν

Μ (SD)

Ν

Μ (SD)

Ν

Μ (SD)

< 1000

63

42,61 (9,94)

21

42,11 (8,89)

42

42,86 (10,52)

10,001–1500

117

48,55 (7,82)

59

47,39 (7,70)

58

49,73 (7,82)

1501–2000

119

51,16 (7,33)

64

50,78 (7,79)

55

51,61 (6,79)

2001–2500

77

53,19 (5,29)

40

53,13 (5,17)

37

53,25 (5,50)

3001–5000

40

52,25 (6,22)

20

51,83 (5,64)

20

52,68 (6,87)

> 5001

33

52,80 (6,61)

21

51,92 (5,80)

12

54,33 (7,86)

P-value

< 0,001

< 0,001

Per category increase (95% C.I.)

2,00 (1,50-2,50)

1,84 (1,16-2,52)

2,23 (1,49-2,97)

P for trend

< 0.001

< 0.001

< 0.001

P for interaction

0,92

Classification of occupation

Ν

Μ (SD)

Ν

Μ (SD)

Ν

Μ (SD)

Level 1

17

48,31 (7,70)

7

49,86 (3,96)

10

47,22 (9,58)

Level 2

123

51,03 (6,91)

44

49,97 (7,90)

79

51,63 (6,27)

Level 3

99

51,97 (5,90)

81

51,44 (5,78)

18

54,34 (5,99)

Level 4

71

53,84 (5,06)

35

53,91 (4,27)

36

53,77 (5,78)

P-value

0,002

0,04

0,01

Per category increase (95% C.I.)

1,51 (0,72-2,31)

1,68 (0,50-2,86)

1,58 (0,46-2,71)

P for trend

< 0,001

0,005

0,006

P for interaction

0,31