Trads Mette, Håkonson Sasja J, Pedersen Preben U
Graven 10 1. th, 8000, Aarhus C, Denmark.
Centre of Clinical Guidelines - Danish Clearinghouse, Department of Medicine and Technology, University of Aalborg, Niels Jernesvej 14, 9220, Alborg, Denmark.
Int J Orthop Trauma Nurs. 2017 Nov;27:7-15. doi: 10.1016/j.ijotn.2016.11.004. Epub 2016 Dec 21.
The Constipation Assessment Scale (CRAS) was developed in order to enable the prediction of the risk of developing constipation. The scale needs validation in acute and elective patients with common disorders.
Two hundred and six acute patients with hip fracture and 200 elective patients with total knee or hip replacement were included. They were assessed with CRAS before surgery and their defecation pattern, stool consistency and degree of straining were measured at admission and 30 days after surgery.
The prevalence of constipation was 0.49 for the acute patients and 0.34 for the elective patients. Sensitivity was 0.67 and 0.57. Specificity was 0.54 and 0.52. Positive predictive value was 0.59 and 0.38, whereas the negative predictive value was 0.63 and 0.7.
When used in an orthopaedic ward, the prognostic accuracy of CRAS is poor and it cannot be recommended as a screening tool.
便秘评估量表（CRAS）旨在预测便秘发生风险。该量表需要在患有常见疾病的急性病患者和择期手术患者中进行验证。
纳入206例髋部骨折急性病患者和200例接受全膝关节或髋关节置换术的择期手术患者。术前用CRAS对他们进行评估，并在入院时和术后30天测量其排便模式、粪便稠度和用力程度。
急性病患者便秘患病率为0.49，择期手术患者为0.34。敏感性分别为0.67和0.57。特异性分别为0.54和0.52。阳性预测值分别为0.59和0.38，而阴性预测值分别为0.63和0.7。
在骨科病房使用时，CRAS的预后准确性较差，不能推荐作为筛查工具。
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