An observational study in Critical Illness and Anemia, sponsored by Hospital H+ Queretaro. Completed at 1 site in Mexico. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-08-12.
Sponsored by Hospital H+ Queretaro · Observational
The goal of this observational study is to evaluate if early absolute hemoglobin decline (during the first 24 hours of admission) can predict prolonged intensive care unit stay (8 days or more) and in-hospital mortality in critically ill adult patients.
The main questions it aims to answer are:
Does absolute hemoglobin decline during the first 24 hours of admission independently predict prolonged intensive care unit stay in critically ill adult patients?
Does absolute hemoglobin decline during the first 24 hours of admission independently predict in-hospital mortality in critically ill adult patients?
Participants will:
Have their routine clinical and laboratory data reviewed retrospectively from their electronic health records (including baseline hemoglobin and a second hemoglobin determination approximately 24 hours after admission). No additional interventions or extra blood draws will be performed beyond routine clinical care.
dult patients admitted to the Intensive Care Unit at Hospital H+ Querétaro, Mexico, between January 2024 and January 2026, who required an ICU stay of more than 48 hours and had serial hemoglobin measurements during routine medical care.
Exclusion Criteria:
Adult patients admitted to the intensive care unit with an ICU stay of more than 48 hours and at least two hemoglobin determinations obtained approximately 24 hours apart during routine care.
Other: Early Absolute Hemoglobin Decline
Measurement of the absolute difference in hemoglobin concentration (g/dL) between baseline ICU admission and approximately 24 hours post-admission. Data was collected retrospectively from electronic health records.
Prolonged Intensive Care Unit Stay
Incidence of prolonged intensive care unit (ICU) length of stay, defined a priori as an ICU stay equal to or greater than 8 days.
Time frame: From ICU admission up to 28 days
In-Hospital Mortality
Incidence of all-cause mortality recorded at hospital discharge.
Time frame: From ICU admission up to 30 days
This study is completed, as verified in Aug 2026. You cannot join it, but the record below documents what was studied.
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Hospital H+ Queretaro