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Table 2 Relative risk of complications in the 30-day postoperative period for patients undergoing primary total hip arthroplasty

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

Total RRa 99.7% CI Pb
Any Complication 0.96 0.89–1.04 0.135
Extended length of stay (> 3 days) 0.98 0.94–1.02 0.164
Blood transfusion 1.02 0.96–1.08 0.408
Readmission 0.92 0.850.99 0.001
Death 0.90 0.60–1.35 0.437
Urinary tract infection 1.00 0.86–1.17 0.970
Pneumonia 0.81 0.62–1.06 0.021
Return to the operating room 0.98 0.88–1.08 0.507
Wound complications 0.95 0.83–1.09 0.269
Thromboembolic complicationsc 0.94 0.77–1.13 0.303
Sepsis/septic shock 0.88 0.66–1.17 0.189
Respiratory complications 0.76 0.52–1.12 0.035
Cardiac complications 1.06 0.81–1.38 0.527
Renal complications 0.80 0.53–1.21 0.110
Cerebrovascular accident 0.85 0.54–1.34 0.293
  1. aPoisson regressions with robust error variance were used to compare these variables. Adjusted for age, gender, BMI, functional status, ASA class, diabetes, smoking status, and congestive heart failure
  2. bBold fonts indicate statistical significance (significant at P < 0.003 due to Bonferroni correction for multiple comparisons). RR Relative risk, CI Confidence interval (99.7% CI due to Bonferroni)
  3. cIncludes deep vein thrombosis and pulmonary embolism