| Disease | constipation | 
| Phenotype | C0009402|colorectal cancer | 
| Sentences | 2 | 
| PubMedID- 23833759 | Several investigators showed that the duration of preoperative constipation was not associated with prognosis after colorectal cancer surgery [21]. | 
| PubMedID- 20551579 | Sonnenberg and muller39 conducted a systematic review of 9 case–control studies published before 1992, and evaluated the risk for colorectal cancer associated with self-reported constipation and bowel movement frequency: constipation was associated with a significant increase in the risk of colorectal cancer (or, 1.48; 95% ci, 1.32–1.66). | 
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