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Table 4 Adjusted odds ratios for CCA associations with various risk factors

From: Association between praziquantel treatment and cholangiocarcinoma: a hospital-based matched case–control study

Characteristics Cases (n = 210) Controls (n = 840) Crude OR Adjusted OR 95 % CI P-value
Number of used PZQ treatments (times) - - 1.33 1.23 1.07 - 1.43 0.005
Number of used PZQ treatments (times)       0.025
 0 48.5 65.9 1 1 -  
 1 32.9 24.4 1.93 1.49 1.02 - 2.20  
 2 8.6 4.9 2.72 1.82 0.92 - 3.60  
 More than 2 10.0 4.8 3.17 2.30 1.20 - 4.40  
Eating raw fish       <0.001
 No 38.6 61.7 1 1 -  
 Yes 61.4 38.3 3.10 2.73 1.88 - 3.95  
History of cancer in family       <0.001
 No 50.0 72.1 1 1 -  
 Yes 50.0 27.9 2.56 2.54 1.82 - 3.55  
Highest educational attainment       0.011
 Primary school 79.1 68.1 1 1 -  
 Secondary school 3.8 6.2 0.51 0.56 0.25 - 1.25  
 High school/diploma 9.5 10.5 0.76 0.76 0.44 - 1.34  
 Bachelor’s degree 7.6 15.2 0.40 0.41 0.23 - 0.75