Table 3.
Joint association between herbal diet intake frequency/duration and nasopharyngeal carcinoma risk in a prospective cohort in Sihui, southern China (N = 10,179).
| Frequency of herbal diet intake | Duration of herbal diet intake | p for trend | |||
|---|---|---|---|---|---|
| ≤5 years | >5 years | ||||
| n | Adjusted HR (95% CI)a | n | Adjusted HR (95% CI)a | ||
| Herbal soup intake | |||||
| Less than monthly | 133 | 1.00 | 937 | 0.09 (0.03,0.28) | <0.001 |
| Monthly or more | 269 | 0.13 (0.04,0.42) | 3,871 | 0.07 (0.03,0.14) | |
| Weekly or more | 224 | 0.09 (0.02,0.39) | 4,745 | 0.07 (0.03,0.14) | |
| Herbal tea intake | |||||
| Less than monthly | 4,312 | 1.00 | 724 | 1.00 (0.41,2.45) | 0.634 |
| Monthly or more | 248 | 2.42 (1.00,5.86) | 3,419 | 0.98 (0.53,1.83) | |
| Weekly or more | 115 | 0.62 (0.08,4.74) | 1,361 | 0.74 (0.29,1.86) | |
a
Adjusting for sex, age, education level, family history of NPC, combined EBV antibodies, smoking status, fresh fruits, fresh vegetables, and salted food in the Cox regression models.