Crude and adjusted HR of colorectal cancer for patients with type 2 diabetes with and without CHMs treatment
| Patient group | Event | PYs | Incidence | Crude HR (95% CI) | Adjusted HR* (95% CI) |
| CHMs non-users | 375 | 151 745.04 | 2.47 | 1.00 | 1 |
| CHMs users | 235 | 135 251.86 | 1.73 | 0.70 (0.60 to 0.83) | 0.71 (0.60 to 0.84) |
| CHMs use for 31–365 days | 208 | 108 166.55 | 1.92 | 0.78 (0.66 to 0.93) | 0.79 (0.67 to 0.94) |
| CHMs use >1 year | 27 | 27 085.31 | 1.00 | 0.40 (0.27 to 0.60) | 0.41 (0.28 to 0.61) |
Incidence rate is per 1000 PYs.
*Model adjusted for age, gender, urbanization level, monthly income and comorbidity.
CHMs, Chinese herbal medicines; PYs, patient-years.