Background
Methods
Study population and design
Definitions of measurements and cohorts
Statistical analysis
Outcome | Sample at riska, n | Baseline | Follow-up |
---|---|---|---|
One-year prevalence of short-duration BNP in 2006 | 10,083 men and 12,765 women | The proportion of individuals in the cohort having experienced at least one episode of BNP in at least 7 consecutive days, but less than 3 consecutive months in 2006 according to a retrospective question in the follow-up questionnaire in 2007 | - |
One-year prevalence of long-duration BNP in 2006 | 10,298 men and 13,146 women | The proportion of individuals in the cohort having experienced constant or at least one episode of bothersome neck pain in at least 3 consecutive months in 2006 according to a retrospective question in the follow-up questionnaire in 2007 | - |
One-year prevalence of short- and/or long-duration BNP in 2006 | 10,123 men and 12,878 women | The proportion of individuals in the cohort having experienced at least one episode of short-duration BNP and/or long-duration BNP in 2006 according to a retrospective question in the follow-up questionnaire in 2007 | - |
Incidence proportion of short- and/or long-duration BNP in 2006 | 8,747 men and 10,105 women | Individuals without short or long- duration BNP in 2005 according to a retrospective question in the follow-up questionnaire in 2007. | The proportion of episodes (1-2 episodes per individual) in the cohort of short- and/or long-duration BNP in 2006 according to a retrospective question in the follow-up questionnaire in 2007 |
Incidence proportion of recovery from short- and/or long-duration BNP in 2006 | 1,358 men and 2,728 women | Individuals with short- and/or long-duration BNP in 2005 according to a retrospective question in the follow-up questionnaire in 2007 | The proportion of individuals without short- or long-duration BNP in 2006 according to a retrospective question in the follow-up questionnaire in 2007 |
Prevalence
Incidence proportion
Results
All | Age 18–29 | Age 30–39 | Age 40–49 | Age 50–59 | Age 60–69 | Age 70–84 | |
---|---|---|---|---|---|---|---|
(n = 23,794) | (n = 3,374) | (n = 4,751) | (n = 4,276) | (n = 5,087) | (n = 3,639) | (n = 2,667) | |
Characteristics
| |||||||
Women, % | 56 | 60 | 60 | 56 | 55 | 50 | 56 |
Age, mean (SD) | 48 (16) | - | - | - | - | - | - |
Living alone, % | 20 | 20 | 15 | 12 | 18 | 25 | 39 |
No parent responsibility for children under the age of 25, % | 57 | 83 | 33 | 19 | 53 | 88 | 92 |
Home and household work ≥ 3h/day, % | 13 | 5 | 12 | 14 | 8 | 16 | 26 |
Born abroad (Immigrant), % | 16 | 11 | 14 | 20 | 16 | 17 | 14 |
Unemployed, % | 3 | 4 | 3 | 3 | 3 | 1 | 0 |
Retired, % | 20 | 0 | 1 | 3 | 7 | 51 | 92 |
Student, % | 6 | 30 | 5 | 2 | 0 | 0 | 0 |
Strained financial situation a, % | 14 | 33 | 19 | 16 | 8 | 5 | 3 |
Daily smoking, % | 15 | 13 | 12 | 19 | 20 | 15 | 9 |
No alcohol the preceding year, % | 10 | 9 | 8 | 8 | 8 | 11 | 19 |
Body Mass Index, mean (SD) | 25 (4) | 23 (4) | 24 (4) | 25 (5) | 26 (4) | 26 (4) | 25 (4) |
Sedentary leisure time b, % | 14 | 15 | 15 | 16 | 14 | 11 | 14 |
Regular exercise in leisure time c, % | 13 | 22 | 14 | 13 | 11 | 12 | 8 |
Psychological distress d, % | 21 | 33 | 28 | 23 | 19 | 11 | 11 |
Much stress at work e, % | 32 | 28 | 43 | 45 | 40 | 16 | 1 |
Bad general health, % | 5 | 3 | 3 | 5 | 6 | 5 | 6 |
Pain from the lower back at least 2 days per week the preceding six months, % | 17 | 11 | 12 | 16 | 19 | 20 | 26 |
Age groups | All | 18-29 years | 30-39 years | 40-49 years | 50-59 years | 60-69 years | 70-84 years |
---|---|---|---|---|---|---|---|
% | % | % | % | % | % | % | |
(95% CI ) | (95% CI) | (95% CI) | (95% CI) | (95% CI) | (95% CI) | (95% CI) | |
n/N
a
|
n/N
a
|
n/N
a
|
n/N
a
|
n/N
a
|
n/N
a
|
n/N
a
| |
The prevalence of short-duration BNP
| |||||||
Men
|
13
|
11
|
15
|
16
|
13
|
11
|
8
|
(12–13) | (9–13) | (13–16) | (14–17) | (12–15) | (9–12) | (7–10) | |
1,274/10,083
|
146/1,339
|
276/1,888
|
281/1,812
|
290/2,199
|
191/1,752
|
90/1,093
| |
Women
|
20
|
19
|
23
|
24
|
21
|
15
|
13
|
(19–21) | (17–21) | (21–24) | (23–26) | (19–22) | (13–17) | (11–15) | |
2,529/12,765
|
372/1,979
|
619/2,828
|
559/2,305
|
547/2,658
|
258/1,742
|
174/1,353
| |
The prevalence of long-duration BNP
| |||||||
Men
|
8
|
5
|
8
|
9
|
10
|
8
|
7
|
(8–9) | (4–6) | (7–9) | (8–11) | (9–11) | (7–9) | (6–9) | |
830/10,298
|
66/1,356
|
147/1,918
|
172/1,849
|
221/2,266
|
141/1,776
|
83/1,133
| |
Women
|
13
|
9
|
13
|
16
|
16
|
12
|
11
|
(13–14 ) | (8–10) | (12–14) | (15–18) | (15–17) | (10–13) | (9–12) | |
1,725/13,146
|
176/2,001
|
362/2,803
|
381/2,380
|
442/2,753
|
213/1,790
|
151/1,419
| |
The prevalence of short- and/or long-duration BNP
| |||||||
Men
|
16
|
13
|
18
|
19
|
16
|
13
|
11
|
(15–16) | (12–15) | (16–19) | (17–21) | (15–18) | (12–15) | (9–12) | |
1,570/10,123
|
180/1,341
| 335/1,896 | 346/1,821 | 365/2,220 | 229/1,749 | 115/1,096 | |
Women
|
25
|
22
|
28
|
30
|
27
|
19
|
16
|
(24–25) | (20–24) | (26–30) | (28–31) | (25–29) | (17–21) | (14–18) | |
3,164/12,878
|
440/1,981
|
768/2,745
|
688/2,328
|
717/2,704
|
330/1,760
|
221/1,360
|
Age groups | All | 18-29 years | 30-39 years | 40-49 years | 50-59 years | 60-69 years | 70-84 years |
---|---|---|---|---|---|---|---|
% | % | % | % | % | % | % | |
(95% CI) | (95% CI) | (95% CI) | (95% CI) | (95% CI) | (95% CI) | (95% CI) | |
n/N
a
| n/N
a
| n/N
a
| n/N
a
| n/N
a
| n/N
a
| n/N
a
| |
The one-year incidence proportion of short- and/or long-duration BNP
| |||||||
Men
|
4
|
6
|
5
|
5
|
4
|
3
|
3
|
(4–5) | (5–8) | (4–7) | (4–6) | (3–5) | (2–4) | (2–4) | |
384/8,747
|
75/1,211
|
86/1,601
|
77/1,500
|
73/1,893
|
47/1,545
|
26/997
| |
Women
|
7
|
8
|
10
|
8
|
5
|
3
|
5
|
(6–7) | (7–10) | (8–11) | (7–10) | (4–6) | (2–4) | (3–6) | |
690/10,105
|
135/1,632
|
201/2,086
|
142/1,714
|
110/2,048
|
49/1,449
|
53/1,176
| |
The one-year incidence proportion of recovery from short- and/or long-duration BNP
| |||||||
Men
|
14
|
20
|
16
|
16
|
11
|
11
|
10
|
(12–16) | (13–27) | (12–20) | (12–21) | (7–14) | (7–15) | (4–17) | |
190/1,358
|
25/128
|
46/291
|
52/317
|
35/323
|
22/203
|
10/96
| |
Women
|
11
|
13
|
14
|
11
|
8
|
10
|
9
|
(10–12) | (9–16) | (11–17) | (9–14) | (6–10) | (7–13) | (5–14) | |
299/2,728
|
44/344
|
92/652
|
68/605
|
49/651
|
30/301
|
16/175
|