Table 4.
Odds ratios (ORs) and 95% confidence intervals (CIs) for the association of yearly solanaceous vegetables intake and colorectal cancer risk according to subsite.
| Yearly solanaceous vegetables intake quartiles | Proximal colon cancer (n = 396) | Distal colon cancer (n = 418) | Rectal cancer (n = 852) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Cases/ controls (n) | OR (95%CI) | Adjusted ORa (95%CI) | Cases/ controls (n) | OR (95%CI) | Adjusted OR (95%CI) | Cases/ controls (n) | OR (95%CI) | Adjusted OR (95%CI) | |
| Potato | |||||||||
| Q1 | 37/48 | 1.00 | 1.00 | 46/46 | 1.00 | 1.00 | 81/102 | 1.00 | 1.00 |
| Q2 | 52/57 | 1.16 (0.67,2.01) | 1.58 (0.75,3.35) | 60/55 | 1.06 (0.62,1.83) | 0.87 (0.38,1.96) | 105/99 | 1.34 (0.90,2.00) | 1.28 (0.74,2.23) |
| Q3 | 12/12 | 1.23 (0.52,2.88) | 2.80 (0.81,9.75) | 9/14 | 0.63 (0.24,1.66) | 0.66 (0.16,2.71) | 32/26 | 1.58 (0.86,2.92) | 1.81 (0.80,4.08) |
| Q4 | 97/81 | 1.51 (0.91,2.50) | 3.22 (1.54,6.71) | 94/94 | 0.98 (0.58,1.68) | 1.81 (0.82,4.00) | 208/199 | 1.31 (0.93,1.87) | 1.36 (0.85,2.19) |
| P for Trendb | 0.412 | 0.013 | 0.733 | 0.119 | 0.330 | 0.454 | |||
| Eggplant | |||||||||
| Q1 | 74/47 | 1.00 | 1.00 | 65/65 | 1.00 | 1.00 | 163/85 | 1.00 | 1.00 |
| Q2 | 48/34 | 0.90 (0.48,1.67) | 0.83 (0.37,1.85) | 45/59 | 0.54 (0.32,0.93) | 0.60 (0.27,1.35) | 99/96 | 0.59 (0.41,0.85) | 0.55 (0.34,0.90) |
| Q3 | 46/44 | 0.59 (0.32,1.09) | 0.66 (0.31,1.41) | 53/50 | 0.73 (0.41,1.28) | 1.10 (0.49,2.44) | 94/114 | 0.39 (0.26,0.59) | 0.57 (0.34,0.98) |
| Q4 | 30/73 | 0.20 (0.10,0.39) | 0.25 (0.10,0.65) | 46/55 | 0.57 (0.32,1.03) | 1.06 (0.47,2.40) | 70/131 | 0.24 (0.16,0.37) | 0.32 (0.18,0.56) |
| P for Trend | <0.001 | 0.03 | 0.111 | 0.441 | <0.001 | 0.001 | |||
| Sweet Pepper | |||||||||
| Q1 | 55/39 | 1.00 | 1.00 | 66/43 | 1.00 | 1.00 | 124/90 | 1.00 | 1.00 |
| Q2 | 52/46 | 0.86 (0.48,1.55) | 0.65 (0.29,1.46) | 45/51 | 0.54 (0.29,1.99) | 0.39 (0.16,0.97) | 108/117 | 0.66 (0.44,0.97) | 0.47 (0.27,0.82) |
| Q3 | 41/57 | 0.53 (0.30,0.93) | 0.41 (0.19,0.93) | 43/46 | 0.57 (0.31,1.04) | 0.52 (0.21,1.25) | 92/105 | 0.64 (0.43,0.94) | 0.50 (0.29,0.87) |
| Q4 | 50/56 | 0.64 (0.36,1.14) | 0.48 (0.21,1.09) | 55/69 | 0.48 (0.27,0.84) | 0.39 (0.17,0.89) | 102/114 | 0.62 (0.41,0.95) | 0.47 (0.26,0.85) |
| P for Trend | 0.125 | 0.146 | 0.062 | 0.114 | 0.059 | 0.019 | |||
| Tomato | |||||||||
| Q1 | 57/51 | 1.00 | 1.00 | 69/45 | 1.00 | 1.00 | 134/92 | 1.00 | 1.00 |
| Q2 | 46/38 | 1.10 (0.62,1.95) | 0.89 (0.40,2.01) | 43/53 | 0.56 (0.33,0.95) | 0.69 (0.34,1.38) | 108/103 | 0.70 (0.47,1.03) | 0.73 (0.43,1.24) |
| Q3 | 56/41 | 1.22 (0.69,2.16) | 1.68 (0.74,3.81) | 62/62 | 0.62 (0.37,1.04) | 0.71 (0.35,1.42) | 101/112 | 0.60 (0.40,0.90) | 0.60 (0.35,1.03) |
| Q4 | 39/68 | 0.42 (0.23,0.78) | 0.57 (0.22,1.48) | 35/49 | 0.39 (0.20,0.77) | 0.85 (0.33,2.16) | 83/119 | 0.45 (0.30,0.68) | 0.57 (0.33,1.01) |
| P for Trend | 0.006 | 0.098 | 0.032 | 0.680 | 0.002 | 0.183 | |||
| Total solanaceous vegetables | |||||||||
| Q1 | 62/52 | 1.00 | 1.00 | 68/54 | 1.00 | 1.00 | 123/102 | 1.00 | 1.00 |
| Q2 | 51/48 | 0.93 (0.55,1.59) | 1.83 (0.85,3.93) | 57/50 | 0.93 (0.55,1.57) | 0.81 (0.39,1.71) | 121/110 | 0.92 (0.64,1.33) | 0.82 (0.49,1.39) |
| Q3 | 46/40 | 0.92 (0.52,1.61) | 1.68 (0.76,3.72) | 46/54 | 0.65 (0.38,1.11) | 1.20 (0.56,2.59) | 93/114 | 0.65 (0.44,0.96) | 0.69 (0.39,1.21) |
| Q4 | 39/58 | 0.49 (0.26,0.90) | 1.52 (0.59,3.89) | 38/51 | 0.52 (0.29,0.96) | 1.22 (0.53,2.82) | 89/100 | 0.70 (0.46,1.06) | 0.91 (0.51,1.63) |
| P for Trend | 0.111 | 0.414 | 0.143 | 0.785 | 0.117 | 0.590 | |||
a
Adjusted by BMI, colon cancer in first-degree relative, smoking status, alcohol drinking, eating breakfast, and fried food, grilled food, and hot and spicy food intake as category variables; and total energy, total fruits, milk product, and red meat intake as continuous variables.
b
Test for trends calculated with the median intake of each category of solanaceous vegetable intake as a continuous variable.
Bold values indicates statistical significance, which is defined as a two-side P < 0.05.