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Table 1 Demographic background of the chiropractors in the survey compared to the Danish Chiropractor's Association (DCA) and the Norwegian Chiropractor's Association (NCA).

From: The Nordic Maintenance Care Program - Time intervals between treatments of patients with low back pain: how close and who decides?

  Danish participants n = 15 DCA n = 455 p Norwegian participants n = 11 NCA n = 397 p Total in survey Total DCA and NCA p
Sex          
   - Female 67% 51% 0,297 9% 30% 0,187 42% 41% 1,000
   - Male 33% 49%   91% 70%   58% 59%  
Age          
   - 20-29 27% 6% 0,037 0% 16% 0,025 15% 11% 0,261
   - 30-39 27% 31%   91% 48%   54% 39%  
   - 40-49 20% 38%   0% 18%   12% 29%  
   - 50-49 27% 18%   0% 15%   15% 16%  
   - 60 or more 0% 7%   9% 3%   4% 5%  
   - missing - -   - <1%   - <1%  
Country of graduation          
   - DK 53% 33% 0,181 27% 11% 0,479 42% 23% 0,218
   - UK 7% 22%   36% 37%   19% 29%  
   - USA/Canada 40% 45%   36% 41%   39% 43%  
   - Other 0% <1%   0% 4%   0% 2%  
   - missing - <1%   - 7%   - 3%  
Clinical experience (years)          
0-1 13% 7% 0,306 9% -   12% -  
2-5 27% 18%   7% -   27% -  
6-10 13% 10%   27% -   19% -  
11-19 7% 25%   27% -   15% -  
more than 20 40% 38%   9% -   27% -  
missing - 2%   - -   - -  
Size of town/village  
0-20.000 7% -   0% -   4% -  
20-100.000 33% -   73% -   50% -  
> 100.000 60% -   27% -   46% -  
Clinic owner/Employee          
   - Clinic owner 67% 62% 0,793 82% -   73% -  
   - Employee 3% 38%   18% -   27% -  
  1. Reported in percentages and p-values for the difference between distributions, tested by means of Fisher's exact test.