ObjectiveTo research on the condition of constipation during the first 30 days after hip fracture. MethodsOne hundred and four patients with hip fracture treated between May 2014 and March 2015 participated in this study. We judged whether there was constipation by recording the defecation pattern and stool consistency in three time periods: from admission to the time just before surgery, from the end of surgery to the time of discharge, and from discharge to 30 days after injury. The defecation pattern was assessed using Bristol Stool Scale and a scale of four-stage defecation was used to assess the stool consistency. ResultsThere were 51.9% (54) of the patients who developed constipation during the first time period, 69.0% (69) during the second time period, and 63.4% (59) in the third time period. The proportion increased by 17% during the second period over the first (P=0.003), while there was no significant difference between the latter two time periods (P=0.581). Normal defecation pattern was re-established 9.7 days after surgery, though 23.7% (22) of the patients did not re-establish normal defecation pattern within the first 30 days after injury. ConclusionThe incidence of constipation during the first 30 days after hip fracture is high. The results imply that further studies are needed to prevent constipation.