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Table 3 Comparison of epidemiological items between the study cohorts/representativeness

From: The population-based oncological health care study OVIS – recruitment of the patients and analysis of the non-participants

Characteristics Basic population (cohort A) Respondents (cohort F) Non-participants (cohort D) p-value for difference between cohort F & D
  % % %  
Melanoma     
N 1,503 608 895  
Sex     0.093
   Male 43.4 46.1 41.7  
   Female 56.6 53.9 58.3  
Surgery     0.877
   Yes 87.9 88.3 87.6  
   No 0.4 0.3 0.4  
   Unknown 11.7 11.3 12.0  
T-category     0.208
   T1 30.9 30.9 30.8  
   T2 11.8 10.7 12.5  
   T3 8.4 9.0 8.0  
   T4 2.7 1.6 3.4  
   Unknown 46.2 47.7 45.3  
Spatial category     0.261
   Rural 46.6 48.4 45.4  
   Urban 53.4 51.6 54.6  
  (N = 1,500)   (N = 892)  
Breast cancer     
N 5,248 1,927 3,321  
Surgery     < 0.001
   Yes 88.8 93.2 86.3  
   No 1.9 0.5 2.8  
   Unknown 9.2 6.3 10.9  
T-category     < 0.001
   T1 48.4 53.8 45.3  
   T2 34.4 34.6 34.3  
   T3 4.8 4.5 5.0  
   T4 6.9 3.4 9.0  
   Unknown 5.4 3.7 6.4  
Spatial category     < 0.001
   Rural 52.1 48.6 54.2  
   Urban 47.9 51.4 45.8  
  (N = 5,228)   (N = 3,301)  
Prostate cancer     
N 4,738 1,750 2,988  
Surgery     < 0.001
   Yes 46.3 56.4 40.5  
   No 19.8 17.6 21.0  
   Unknown 33.9 26.0 38.5  
Hormone therapy    < 0.001  
   Yes 31.5 28.2 33.4  
   No 28.2 34.3 24.6  
   Unknown 40.3 37.4 42.0  
T-category     < 0.001
   T1 15.9 15.0 16.4  
   T2 39.0 45.8 35.0  
   T3 22.8 28.5 19.5  
   T4 1.9 1.5 2.2  
   Unknown 20.4 9.3 27.0  
Spatial category     0.124
   Rural 54.8 56.3 54.0  
   Urban 45.2 43.7 46.0  
  (N = 4,718)   (N = 2,968)