|
Independent variables
|
LBPyear
|
LBPlong
|
DD
|
VIP
|
|---|
|
Smoking
| | | | |
|
None
|
64 (56–71)
|
27 (20–33)
|
51 (44–59)
|
15 (10–21)
|
|
1–19 cig/day
|
72 (65–79)
|
20 (14–26)
|
50 (42–57)
|
16 (11–22)
|
|
≥20 cig/day
|
73 (62–83)
|
33 (22–44)
|
57 (45–69)
|
26 (15–36)
|
|
BMI
| | | | |
|
Underweight
|
50 (26–74)
|
15 (-2 -32)
|
40 (16–63)
|
10 (-4-24)
|
|
Normal weight
|
69 (62–75)
|
25 (19–31)
|
49 (42–55)
|
18 (13–23)
|
|
Overweight
|
70 (62–79)
|
28 (19–36)
|
59(50–68)
|
20 (13–27)
|
|
Heavy overweight
|
72 (60–83)
|
22 (11–32)
|
55 (42–68)
|
17 (7–26)
|
|
Work
| | | | |
|
Sitting
|
67 (57–77)
|
20 (12–29)
|
43 (34–55)
|
11 (4–18)*
|
|
S itting/walking
|
67 (59–74)
|
22 (15–29)
|
58 (49–66)
|
19 (13–26)
|
|
Light physical
|
68 (59–78)
|
30 (21–40)
|
46 (35–56)
|
10 (3–16)
|
|
Hard physical
|
75 (54–84)
|
26 (17–36)
|
58 (48–69)
|
31 (21–41)*
|
- *The non-overlapping confidence intervals between the "best" and the "worst" categories are written in bold.
- LBPyear = LBP some time in the past year.
- LBPlong = LBP for altogether at least 30 days in the past year.
- DD = disc degeneration as defined in the methods section.
- VIP = vertebral inflammatory process as defined in the methods section
