Table 2.
Association of dietary factors with NPC
| Intake frequency * | Adulthood | Childhood | ||
|---|---|---|---|---|
| Case/Ctrl | OR(95%CI)# | Case/Ctrl | OR (95%CI)# | |
| Salted fish | ||||
| Less than monthly (ref) | 1085/1272 | 1.0 | 724/1075 | 1.0 |
| Monthly | 162/80 | 2.39(1.80-3.17) | 236/116 | 3.04(2.38-3.87) |
| Weekly or more | 128/98 | 1.58(1.20-2.09) | 415/254 | 2.45(2.03-2.94) |
| P trend | < 0.001 | < 0.001 | ||
| Salted vegetables | ||||
| Less than monthly (ref) | 970/1252 | 1.0 | 551/962 | 1.0 |
| Monthly | 218/85 | 3.31(2.54-4.31) | 204/129 | 2.72(2.13-3.48) |
| Weekly or more | 190/113 | 2.20(1.71-2.82) | 624/355 | 3.17(2.68-3.77) |
| P trend | < 0.001 | < 0.001 | ||
| Preserved/cured meat | ||||
| Less than monthly (ref) | 606/1256 | 1.0 | 859/1242 | 1.0 |
| Monthly | 170/46 | 7.80(5.33-11.39) | 55/49 | 1.67(1.09-2.54) |
| Weekly or more | 157/37 | 9.69(6.39-14.70) | 35/27 | 2.09(1.22-3.60) |
| P trend | < 0.001 | 0.001 | ||
| Fermented pastes | ||||
| Less than monthly (ref) | 1243/1301 | 1.0 | 1056/1203 | 1.0 |
| Monthly | 76/44 | 1.82(1.24-2.66) | 149/80 | 2.12(1.59-2.82) |
| Weekly or more | 56/106 | 0.57(0.41-0.79) | 174/164 | 1.22(0.97-1.54) |
| P trend | 0.157 | 0.001 | ||
| Fresh fruits | ||||
| Less than monthly (ref) | 299/234 | 1.0 | 1176/797 | 1.0 |
| Monthly | 138/91 | 1.22(0.85-1.76) | 92/166 | 0.38(0.28-0.50) |
| Weekly or more | 936/1126 | 0.63(0.51-0.77) | 106/481 | 0.12(0.09-0.16) |
| P trend | 0.157 | 0.001 | ||
* Intake frequency was categorised as follows: less than monthly, < once per month; monthly, once per month to once per week; weekly or more, ≥ once per week.
# OR, odds ratio calculated among matched case and control groups, adjusting for sex, age, education, dialect and household type.