Hypoalbuminaemia contributes to postoperative pulmonary complications and mortality: a systematic review and

Xi Wang1, Hong Tang1, Mingke Zheng1

  • 1Department of Critical Care Medicine, The First Affiliated Hospital of Chongqing Medical University, Yuzhong, 400016, China.

BMC Anesthesiology
|January 30, 2026
PubMed
Abstract

Insights

Hypoalbuminemia, a condition of low albumin levels, significantly predicts postoperative pulmonary complications and mortality in patients undergoing general anesthesia. This risk varies across different surgical types, highlighting its importance in preoperative assessment.

Area of Science:

  • Anesthesiology and Perioperative Medicine
  • Critical Care and Respiratory Medicine
  • Surgical Outcomes and Patient Safety

Background:

  • Hypoalbuminemia is a common finding in surgical patients and is associated with adverse outcomes.
  • The predictive value of hypoalbuminemia for postoperative pulmonary complications (PPCs) and mortality requires comprehensive assessment.

Purpose of the Study:

  • To systematically review and meta-analyze existing literature to determine if hypoalbuminemia predicts PPCs and mortality in patients undergoing general anesthesia.
  • To investigate the association between hypoalbuminemia and specific types of surgical procedures.

Main Methods:

  • A comprehensive literature search was conducted across PubMed, Web of Science, EMBASE, and the Cochrane Library up to July 18, 2024.
  • Data from 40 studies involving 477,701 patients were included in the meta-analysis.
  • Study quality was assessed using the Newcastle–Ottawa Scale, and data were analyzed using Review Manager version 5.4.1.

Main Results:

  • Hypoalbuminemia was a significant predictor of PPCs and mortality after general anesthesia (OR: 2.88, 95% CI 2.50 to 3.32).
  • The predictive value varied by surgical site: orthopaedic surgery (OR: 4.03), abdominal surgery (OR: 2.48), other surgeries (OR: 2.34), and thoracic surgery (OR: 1.82).
  • Patients with hypoalbuminemia exhibited significantly increased mortality (OR: 4.31).

Conclusions:

  • Preoperative hypoalbuminemia is a significant independent predictor of postoperative pulmonary complications and mortality.
  • The strength of this association differs across various surgical specialties, emphasizing the need for tailored risk assessment.

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