Skip to main content

Advertisement

Table 2 Characteristics of case and control groups

From: Dietary patterns and risk of colorectal cancer in Tehran Province: a case–control study

Variable Control (N=142) n (%) Case (N=71) n (%) **P-value
Gender    
  Female 72(50.7) 36(50.3) *
  Male 70(49.3) 35(49.3)  
Age (years)    
  Male (M ± SD) 59.93±10.46 59.9 ± 10.14†† *
  Female (M ± SD) 55.99±10.29 55.65 ±10.36  
Level of education    0.147
  No formal education 36(25.4) 28 (39.4)  
  Elementary 45(31.7) 22 (31.0)  
  Junior/Senior high school 19 (9.2) 7 (9.9)  
  Diploma/ College/University 42(29.6) 14 (19.7)  
Occupation    0.776
  Employed/Government 14( 9.9 ) 6 (8.5)  
  Employed/Private 15(10.6) 10(14.1)
  Housewife(unemployed ) 58(40.8) 33(46.5)
  Retired 26(18.3) 11(15.5)
  Self-employed 29(20.4) 11(15.5)
Total household Income    
  < $ 425 83(58.5) 46(78.8)  
  ≥ $ 425 59(41.5) 25(21.2)  
  M ± SD 471.07 ± 285.4 413.20 ± 237.7 0.141
Family history of CRC in first degree 2(1.4) 7 (9.9) 0.004
Family history of CRC in second degree 1(0.7) 6 (8.5) 0.003
Smoking status    0.948
  Never 103(72.7) 50 (70.6)  
  Former smoker, (pack/year) < 20 9 (6.3) 7 (9.8)  
  Former smoker, (pack/year) ≥ 20 8 (5.6) 2 (2.8)  
  Current smoker, (pack/year) < 20 13 (9.1) 5 (7.0)  
  Current smoker, (pack/year) ≥ 20 9 (6.3) 7 (9.8)  
Physical activity    0.498
  Active 73 (51.4) 33 (46.5)  
  Sedentary 69 (48.6) 38 (53.5)  
Common ways of cooking meat    0.282
  Fried 28 (19.7) 20 (28.2)  
  Fried /Boiling 71 (50.0) 35 (49.3)  
  Smoking/Grilling 43 (30.3) 16 (22.5)  
Common ways of preparing vegetable    0.148
  Raw/ fresh 78 (54.9) 29 (40.8)  
  Boiled 18 (12.7) 8 (11.3)  
  Fried, Fried / freezed 46(32.4) 34(47.9)  
Non-steroidal anti-inflammatory drugs use    
  Ibuprofen 22 (15.5) 5 (7.1) 0.081
  Aspirin 16(11.3) 1(1.4) 0.012
  Acetaminophen 29(20.42) 4(5.6) 0.049
  Baby aspirin 19(13.4) 15(21.1) 0.146
Vitamin use 18(12.7) 7(9.85) 0.547
Mineral use 36(25.3) 8(11.3) 0.017
Body mass index (Kg/m2)    
  ≤ 24.9 48(33.7) 22(32.8)  
  > 24.9 94(66.3) 49(67.2)  
  Mean BMI 26.67± 4.2 27.23 ± 4.2 0.361
Energy Intake (kcal/d) (M ± SD) 2063 ± 40.7 2212 ± 50.7 0.045
  1. *Matched variables of the study 1USD= 9,980.00 Rial Significant difference at p< 0.05 M ± SD: Mean ± Standard deviation.
  2. 1MET: metabolic equivalent task (1MET=energy expenditure of sitting quietly or approximately 1kcal/kg of body weight per hour).
  3. **P-values were estimated using chi-square (χ2) statistics, independent t-test for the difference between case and control groups.
  4. †Meanage at the interview.
  5. †† Mean age at the diagnosis.