Perioperative medicine & outcomes

Association of non-anaemic iron deficiency with postoperative outcomes after fast-track hip and knee arthroplasty: a prospective cohort study

Br J AnaesthPublished Prospective cohort study

Authors' conclusion

The influence of iron deficiency on days alive and at home at 30 and 90 days after fast-track hip or knee arthroplasty was statistically significant, but of minimal clinical importance.

Study context

Population
Patients undergoing primary unilateral fast-track hip or knee arthroplasty, eight Danish departments
Participants
964 vs 3,919
Exposure
Non-anaemic iron deficiency vs iron replete
  • Iron deficientn = 964
  • Iron repleten = 3,919reference
Outcome
Median DAH at POD 30 (DAH30) and POD 90 (DAH90), adjusted for procedure, hospital and comorbidity (quantile regression)
Follow-up
30 and 90 days
Methodological detailsmulticentre registry
  • Multicentre registry

Main finding

As reported in the abstract

DAH30 · 30 days
Each group vs iron repleteEstimate (95% CI)P value
Iron deficient
adjusted difference in median DAH30 −0.00 days(−0.00 to −0.00)
P = 0.001
Iron deficient
adjusted difference in median DAH90 −0.00 days(−0.00 to −0.00)
P = 0.006
DAH30 differently distributed between groups
P < 0.001

Observational data: associations, not effects.

Further findings

LOS >2 days, 30-day readmission, EQ-VAS at 90 days

No association between iron deficiency and any of the other endpoints

Original publication

Association of non-anaemic iron deficiency with postoperative outcomes after fast-track hip and knee arthroplasty: a prospective cohort study. Br J Anaesth. Published 21 May 2025. doi:10.1016/j.bja.2025.03.039

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