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. 2013 May 1;14:155. doi: 10.1186/1471-2474-14-155

Table 5.

Prevalence and association of occupation with chronic low back pain

Variable  
 
     Crude analyses
 
Adjusted analyses**
N % PRR 95% CI P PRR 95% CI P
Occupation
 
 
 
 
0,001*
 
 
0,03*
Never Worked
195
4.6
1
-
 
1
-
 
Trade/sales
480
6.3
1.35
0.65-2.82
 
1.36
0.62-3.00
 
Health
124
8.9
1.91
0.82-4.47
 
1.53
0.62-3.75
 
Education
205
8.3
1.79
0.77-4.14
 
1.66
0.71-3.89
 
Manufacturing
350
10.0
2.16
1.00-4.64
 
2.07
0.94-4.54
 
Cleaning
346
14.4
3.11
1.49-6.49
 
2.11
1.00-4.54
 
Services
864
10.3
2.23
1.15-4.33
 
2.30
1.13-4.65
 
Civil construction
99
9.1
1.96
0.79-4.88
 
2.47
0.92-6.64
 
Agriculture 66 16.7 3.59 1.43-9.01   2.78 1.03-7.51  

* Wald Test for Heterogeneity.

**Adjusted for the variables from 1st, 2nd and 3rd levels.

95% Confidence Interval.