Table 3 Poisson regression model of decrease of 3 or more drugs

Age

65–74

47

14

29.8

Reference

74-

55

12

21.8

0.9

0.5–1.9

0.87

Sex

Men

56

15

26.8

Reference

Women

46

11

23.9

1.0

0.4–2.3

0.99

Metabolic components

No

20

8

40.0

Reference

Yes

82

18

22.0

0.6

0.3–1.2

0.13

FBSS

No

94

24

25.5

Reference

Yes

8

2

25.0

0.8

0.3–2.3

0.72

Surgical procedure

decompression

59

13

22.0

Reference

decompression + fusion

43

13

30.2

1.5

0.7-3.0

0.31

JOABPEQ

Pain disorder

Tertile1 (< 15)

38

6

15.8

Reference

Tertile2 (15–57)

32

10

31.3

1.6

0.6–4.3

0.32

Tertile3 (> 57)

32

10

31.3

1.8

0.6–4.8

0.26

Lumbar function

Tertile1 (< 26)

35

9

25.7

Reference

Tertile2 (26–67)

32

7

21.9

0.5

0.2–1.3

0.16

Tertile3 (> 67)

35

10

28.6

0.5

0.2–1.4

0.17

Walking ability

Tertile1 (0)

26

5

19.2

Reference

Tertile2 (1–29)

47

12

25.5

1.7

0.7–4.3

0.24

Tertile3 (> 29)

29

9

31.0

2.4

0.7–8.2

0.15

Social life

Tertile1 (< 25)

34

10

29.4

Reference

Tertile2 (25–49)

35

6

17.1

0.5

0.2–1.4

0.19

Tertile3 (> 49)

33

10

30.3

0.5

0.2–1.5

0.25

Psychological disorder

Tertile1 (< 36)

33

6

18.2

Reference

Tertile2 (36–50)

36

8

22.2

1.8

0.7–4.5

0.25

Tertile3 (> 50)

33

12

36.4

2.6

1.0-6.5

0.045