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Table 1 Comparison of cohorts pre- and post-universal screening

From: Efficacy and cost-effectiveness of universal pre-operative iron studies in total hip and knee arthroplasty

  2013–2015 (pre-universal screening group) 2015–2017 (universal screening group) P-value
Number 420 514  
Age, mean (SD) 71.1 (9.26) 71.7 (9.51) 0.3324
Gender (M:F) 200:220 239:275 0.9805
Side (right:left) 195:225 271:243 0.0484
THA:TKA 220:200 296:218 0.9151
BMI, mean (SD) 30.12 (5.60) 29.56 (5.67) 0.1317
Haemoglobin (pre-op), mean (SD) 134.97gm/dl (12.33) 138.33gm/dl (12.91) 0.0001
Iron deficiency anaemia 105 (25%) 180 (35%) 0.7829
Iron infusion rate 21 (5%) 71 (13.8%) <0.0001
Blood transfusion rate 20 (4.8%) 15 (2.9%) 0.0886