Table 2 Interaction of education, income and classification of occupation with quality of life – Mental dimension

None/Primary

26

46,18 (11,04)

15

47,95 (10,77)

11

43,77 (11,45)

Secondary-Lower

56

49,30 (8,93)

26

49,73 (7,37)

30

48,91 (10,20)

Secondary-Upper

191

49,59 (7,35)

104

51,22 (6,71)

87

47,63 (7,64)

Undergraduate

146

51,25 (6,50)

63

52,70 (6,00)

83

50,15 (6,68)

Postagraduate

27

52,61 (5,89)

13

52,45 (7,51)

14

52,75 (4,17)

P-value

0,005

0,10

0,015

Per category increase (95% C.I.)

1,40 (0,66-2,14)

1,32 (0,34-2,30)

1,65 (0,56-2,74)

P for trend

< 0,001

0,008

0,003

P for interaction

0,56

Income (€)

Ν

Μ (SD)

Ν

Μ (SD)

Ν

Μ (SD)

< 1000

63

43,88 (10,80)

21

43,79 (10,36)

42

43,92 (11,14)

10,001–1500

117

49,53 (7,13)

59

50,35 (7,36)

58

48,70 (6,85)

1501–2000

119

51,24 (6,16)

64

52,09 (5,84)

55

50,26 (6,44)

2001–2500

77

51,90 (6,32)

40

53,58 (4,95)

37

50,09 (7,15)

3001–5000

40

53,19 (4,40)

20

54,49 (3,71)

20

51,89 (4,74)

> 5001

33

51,91 (5,44)

21

51,83 (6,02)

12

52,04 (4,49)

P-value

< 0,001

< 0,001

< 0,001

Per category increase (95% C.I.)

1,56 (1,10-2,04)

1,40 (0,77-2,04)

1,57 (0,86-2,29)

P for trend

< 0,001

< 0,001

< 0,001

P for interaction

0,72

Classification of occupation

Ν

Μ (SD)

Ν

Μ (SD)

Ν

Μ (SD)

Level 1

17

51,31 (5,52)

7

52,98 (2,44)

10

50,15 (6,83)

Level 2

123

48,80 (8,00)

44

50,89 (7,67)

79

47,63 (7,99)

Level 3

99

52,70 (4,53)

81

53,02 (4,18)

18

51,23 (5,76)

Level 4

71

51,51 (5,70)

35

52,73 (5,48)

36

50,32 (5,73)

P-value

< 0,001

0,22

0,11

Per category increase (95% C.I.)

1,17 (0,34-2,01)

0,67 (−0,40, 1.75)

1,01 (−0.25, 2.27)

P for trend

0,006

0,22

0,11

P for interaction

0,90