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
Among 37 studies in Anemia with a site in Mexico — 2 open to participants now, 4 under way, 3 of them phase 3. Anemia · Mexico.
Among the 37 studies in Anemia with a site in Mexico, this one is one of 3 that started in 2026, is one of 2 observational ones, and was the 37th registered.
1,810 studies on the registry are indexed under Anemia; 215 are open to participants now.
Browse Anemia studies →2 of the 37 studies in Anemia with a site in Mexico are open now. Recruiting first, the newest first:
Takeda · Sites in Mexico, United States, Argentina and 28 more countries
Ages 18+
Takeda · Sites in Mexico, United States, Argentina and 25 more countries
Ages 18+
A study can be open while its sites in Mexico have not opened yet or have stopped. Only those recruiting at a site in Mexico →
Of the 122 Anemia studies recruiting now, 67 (55%) set no upper age limit and 37 (30%) stop at 75 or younger; 34 take children under 18; 23 take healthy volunteers.
This study: 18 Years and older · all sexes · no healthy volunteers.
The full table on the hub →This tab as a report to print or save as PDF → With an account.
37 studies; the count open now beside each. This study's row is marked.
A study in two phases is counted once above. Listed by phase, each with its combined phases: Phase 2 4 · Phase 3 29 · Phase 4 3
First in 2000; this study’s year is marked. 3 started in 2026.
By drug class, each counting the studies that test any of its medicines:
This study's enrollment of 128 is below the median of 270 across 368 observational studies indexed under Anemia.
Median enrollment 574 across the 35 interventional studies, 101 across the 2 observational. Of the 33 that completed or were terminated, 27 (82%) have results posted.
This tab as a report to print or save as PDF → With an account.
32 of 37 have an industry lead sponsor. The 10 most frequent:
Hospital H+ Queretaro is the lead sponsor of 13 studies on the registry; 6 are open to participants now.
Hospital H+ Queretaro has 1 study filed under Anemia — fewer than ten, so there is no comparison to draw.
None of the studies under way reaches primary completion within a year.
Among the 37 studies in Anemia with a site in Mexico, from their registry updates:
Nothing recorded among them since 2026-09-25.
This tab as a report to print or save as PDF → With an account.
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.
1,810 studies on the registry are indexed under Anemia; 215 are open to participants now.
This study's enrollment of 128 is below the median of 270 across 368 observational studies indexed under Anemia.
Browse Anemia studies →Hospital H+ Queretaro is the lead sponsor of 13 studies on the registry; 6 are open to participants now.
Compared within Anemia, this study's primary condition as ClinicalTrials.gg classifies it; the registry's first condition term is Critical Illness. The counts are of registry records indexed under each term, refreshed daily. How we classify →
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.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).
Hemoglobin (Hb)
The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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
Ran from Jul 2026 to primary completion in Jul 2026, 0 months.
How these figures are worked out, and which studies are left out of them.
This study is completed, as verified in Aug 2026. You cannot join it, but the record below documents what was studied.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
Hospital H+ Queretaro