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Table 4 LOS, expenses and complications

From: Association between preoperative hemoglobin and postoperative moderate and severe anemia among patients undergoing primary total knee arthroplasty: a single-center retrospective study

Variables Non-DMSA group, N = 222 DMSA group, N = 252 p
LOS 3.06 ± 0.92 3.92 ± 0.94 0.002*
Hospitalization expenses ∆ 57,143.1 ± 9246.5 59,532.3 ± 9618.2 0.031*
Transfusion 0 2 (0.8%) 0.501
Death 0 0
DVT 2 (0.9%) 1(0.4%) 0.602
PE 0 0
Nausea and vomiting 17 (7.7%) 29 (11.5%) 0.158
Cardiac infarction 1 (0.5%) 0 0.468
Stroke 0 0
Acute renal failure 0 0
Wound complications 23 (10.4%) 29 (11.5%) 0.690
Readmission 2 (0.9%) 2 (0.8%) 1.000
  1. Wound complications included exudation, bleeding, swelling, infection and impaired wound healing
  2. LOS, length of stay; DVT, deep venous thrombosis; PE, pulmonary embolism
  3. p value calculated using independent t-test, Pearson's chi-squared test or Fisher's exact test
  4. ∆ Results were presented as Chinese yuan
  5. *Significant difference