Table 3 |
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|
Cumulative lumbar load and lumbar disc disease among women |
||||||||||||||
|
Control subjects |
Lumbar disc herniation |
Lumbar disc narrowing |
||||||||||||
|
N |
% |
N |
% |
Adj. ORa |
95% CI |
Adj. ORb |
95% CI |
N |
% |
Adj. ORa |
95% CI |
Adj. ORb |
95% CI |
|
|
|
||||||||||||||
|
Cumulative lumbar load through manual materials handling and/or intensive-load postures |
||||||||||||||
|
0 Nh |
195 |
43.5 |
71 |
25.5 |
1.0 |
- |
1.0 |
- |
55 |
26.7 |
1.0 |
- |
1.0 |
- |
|
>0 – <4.04*106Nh |
84 |
18.8 |
55 |
19.8 |
1.9 |
1.2–3.0 |
1.6 |
1.1–2.7 |
28 |
13.6 |
1.4 |
0.8–2.5 |
1.2 |
0.6–2.1 |
|
4.04 – <14.47*106Nh |
85 |
19.0 |
74 |
26.6 |
2.7 |
1.8–4.2 |
2.4 |
1.6–3.8 |
50 |
24.3 |
2.9 |
1.8–5.0 |
2.3 |
1.3–3.9 |
|
> = 14.47*106Nh |
84 |
18.8 |
78 |
28.1 |
2.8 |
1.8–4.2 |
2.3 |
1.5–3.6 |
73 |
35.4 |
2.6 |
1.6–4.2 |
2.0 |
1.2–3.2 |
|
Cumulative lumbar load through manual materials handling |
||||||||||||||
|
0 Nh |
218 |
48.7 |
92 |
33.1 |
1.0 |
- |
1.0 |
- |
61 |
29.6 |
1.0 |
- |
1.0 |
- |
|
0 – <1.58*106Nh |
76 |
17.0 |
46 |
16.5 |
1.5 |
1.0–2.4 |
0.8 |
0.4–1.6 |
20 |
9.7 |
1.3 |
0.7–2.4 |
1.3 |
0.5–3.3 |
|
1.58 – <9.06*106Nh |
77 |
17.2 |
70 |
25.2 |
2.4 |
1.6–3.6 |
1.0 |
0.5–1.9 |
62 |
30.1 |
3.5 |
2.1–5.6 |
3.0 |
1.3–6.8 |
|
> = 9.06*106Nh |
77 |
17.2 |
70 |
25.2 |
2.3 |
1.5–3.5 |
0.8 |
0.4–1.6 |
63 |
30.6 |
2.5 |
1.6–4.0 |
1.9 |
0.8–4.4 |
|
Cumulative lumbar load through intensive-load postures |
||||||||||||||
|
0 Nh |
206 |
46.0 |
75 |
27.0 |
1.0 |
- |
1.0 |
- |
61 |
29.6 |
1.0 |
- |
1.0 |
- |
|
>0 – <2.77*106Nh |
80 |
17.9 |
52 |
18.7 |
1.9 |
1.2–3.0 |
1.9 |
1.0–3.7 |
24 |
11.7 |
1.3 |
0.7–2.4 |
0.7 |
0.3–1.7 |
|
2.77 – 8.83 *106Nh |
81 |
18.1 |
66 |
23.7 |
2.5 |
1.6–3.8 |
2.4 |
1.2–4.6 |
45 |
21.8 |
2.2 |
1.3–3.7 |
0.8 |
0.3–1.9 |
|
> = 8.83*106Nh |
81 |
18.1 |
85 |
30.6 |
3.2 |
2.1–4.9 |
3.2 |
1.6–6.3 |
76 |
36.9 |
2.8 |
1.8–4.5 |
1.1 |
0.5–2.7 |
|
Lag-time analysis I: Cumulative lumbar load up to 10 years prior to diagnosis or interview date (in controls) = exposure during last 10 years set to zero |
||||||||||||||
|
0 Nh |
215 |
48.0 |
92 |
33.1 |
1.0 |
- |
1.0 |
- |
56 |
27.2 |
1.0 |
- |
1.0 |
- |
|
>0 – <4.04*106Nh |
97 |
21.7 |
60 |
21.6 |
1.5 |
1.0–2.3 |
1.4 |
0.9–2.1 |
37 |
18.0 |
1.6 |
1.0–2.7 |
1.4 |
0.8–2.3 |
|
4.04 – <14.47*106Nh |
70 |
15.6 |
62 |
22.3 |
2.5 |
1.6–3.9 |
2.2 |
1.4–3.4 |
44 |
21.4 |
2.9 |
1.7–5.0 |
2.2 |
1.3–3.9 |
|
> = 14.47*106Nh |
66 |
14.7 |
64 |
23.0 |
2.5 |
1.6–3.9 |
2.2 |
1.4–3.4 |
69 |
33.5 |
2.9 |
1.8–4.7 |
2.2 |
1.3–3.7 |
|
Lag-time analysis II: Cumulative lumbar load; solely subjects unexposed in the last 10 years prior to diagnosis or interview date (in controls) = subjects exposed in the last 10 years excluded |
||||||||||||||
|
0 Nh |
195 |
75.9 |
71 |
64.5 |
1.0 |
- |
1.0 |
- |
55 |
53.4 |
1.0 |
- |
1.0 |
- |
|
>0 – <4.04*106Nh |
25 |
9.7 |
12 |
10.9 |
1.2 |
0.6–2.6 |
1.1 |
0.5–2.4 |
15 |
14.6 |
1.2 |
0.6–2.8 |
1.1 |
0.5–2.5 |
|
4.04 – <14.47*106Nh |
18 |
7.0 |
14 |
12.7 |
2.2 |
1.0–4.8 |
1.9 |
0.9–4.3 |
19 |
18.4 |
2.9 |
1.3–6.6 |
2.2 |
1.0–5.2 |
|
> = 14.47*106Nh |
19 |
7.4 |
13 |
11.8 |
1.4 |
0.6–3.1 |
1.3 |
0.6–3.0 |
14 |
13.6 |
1.2 |
0.5–2.8 |
1.1 |
0.4–2.5 |
|
|
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|
a Adjusted for age and region b Adjusted for age, region, and psychosocial workload; OR for manual materials handling additionally adjusted for intensive-load postures and vice versa |
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|
Seidler et al. BMC Musculoskeletal Disorders 2009 10:48 doi:10.1186/1471-2474-10-48 |
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