Does dehydration prior to primary total joint arthroplasty increase risk of perioperative complications?

Arthroplasty

Table 4 Relative risk of complications in the 30-day postoperative period for patients undergoing primary total knee arthroplasty

Adverse Event	RR^a	99.7% CI	P-value^b
Any Complications	0.97	0.92–1.03	0.138
Urinary tract infection	1.09	0.96–1.23	0.040
Blood transfusion	1.02	0.96–1.07	0.408
Extended length of stay (> 3 days)	0.94	0.91–0.97	< 0.001
Readmission	0.91	0.86–0.97	< 0.001
Death	1.00	0.72–1.39	0.973
Pneumonia	0.88	0.73–1.07	0.059
Return to the operating room	0.91	0.82–1.01	0.007
Wound complications	0.98	0.88–1.09	0.586
Thromboembolic complications^c	0.99	0.90–1.09	0.825
Sepsis/septic shock	0.92	0.74–1.16	0.303
Respiratory complications	0.91	0.68–1.21	0.322
Cardiac complications	1.00	0.81–1.23	0.993
Renal complications	0.83	0.63–1.10	0.047
Stroke/cerebrovascular accident	1.03	0.70–1.51	0.805

^aPoisson regressions with robust error variance were used to compare these variables. Adjusted for age, gender, BMI, ASA class, diabetes, and smoking status
^bBold fonts indicate statistical significance (significant at P < 0.003 due to Bonferroni correction for multiple comparisons). RR Relative risk, CI Confidence interval (99.70% CI due to Bonferroni)
^cIncludes deep vein thrombosis and pulmonary embolism

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