Machine Learning Model to Predict Hospital Length of Stay (HOLS) and Mortality After Discharge in Hospitalized Oncologic Patients [Plantology Database]: a Multicenter Cross-validation Study
Conditions: Solid Tumor, Nutrition Related Neoplasm/Cancer, Comorbidities and Coexisting Conditions, Mental Status Change, Artificial Intelligence, Oncology, Tumor, Quality of Life
Sponsor: Vall d'Hebron Institute of Oncology

 
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OFFICIAL TITLE: Machine Learning Model to Predict Hospital Length of Stay 
(HOLS) and Mortality After Discharge in Hospitalized Oncologic Patients [Plantology 
Database]: a Multicenter Cross-validation Study 
NCT NUMBER: NCT ID not yet assigned 
13th of August 2020 
 
 

 
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PATIENT INFORMATION SHEET 
Dear patient, 
We propose you to participate in the research project entitled: "Multicenter study on 
clinical and analytical prognostic factors of patients hospitalized in oncology, a holistic 
approach [Plantology]." 
Goals 
We request your participation in this project whose purpose is the investigation of clinical, 
analytical, nutritional factors, psychological status, quality of life and duration of hospital 
stay as well as survival after hospitalization in order to find improvement measures for 
the future of our hospitalization and treatment of our cancer patients. 
Benefits 
There may be no direct benefit to your participation in the study. However, the 
identification of possible prognostic and/or predictive factors of improvement or 
worsening of the quality of life and survival of hospitalized patients could benefit other 
patients in the future and contribute to a better understanding and treatment of patients 
who require inpatient care. 
Study Procedure 
We request your authorization for the use of clinical information and blood samples when 
applicable, which will be kept in the SAP computer system of the Vall d'Hebron Hospital. 
We will also ask you to answer 2 surveys; one psychological and another on quality of 
life. The blood samples will be taken coinciding with the requested blood test for 
healthcare purposes during their hospital stay and in regular outpatient controls. Your 
sample will only be used in this research project approved by a Research Ethics 
Committee. At the end of it, it will be destroyed. If you change your mind after submitting 
your biological samples for study, you may request that your sample be destroyed; To do 
this, you can contact the PI of the Medical Oncology service. 
Discomfort and possible risks 
Participating in this study will not cause any additional inconvenience to the secondary 
of the procedures associated with blood collection and answering 2 surveys; 1 
psychological and another about their quality of life. 
Place of analysis 
The parameters of the blood test will be analyzed in the Medical Oncology Service of the 
Vall d'Hebron University Hospital and the VHIO (Vall d'Hebron Institut of Oncology). 
Personal data protection 
If you agree to take part, your doctor will ask you to sign a consent. This means that you 
agree to participate and that you have no objection that relevant parts of your medical 
record may be reviewed by authorized personnel for the purposes of the trial. In 
accordance with current European and national regulations on the Protection of Personal 
Data, you are informed and consequently consent that your data be included in a file duly 

 
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registered with the Spanish Agency for Data Protection in order to carry out the study. of 
which you have been informed in this document. 
Only the data collected for the study will be transmitted to third parties, which in no case 
will contain information such as name and surname, initials, address, or not from social 
security. In the event that this transfer occurs, it will be for the same purposes of the study 
described and guaranteeing confidentiality at least with the level of protection of the 
legislation in force in our country. If you want to know more about it, you can consult 
with the principal investigator or contact the Data Protection Delegate. Appropriate 
measures will be adopted to guarantee the protection of your privacy and your data will 
not be cross-referenced with other databases that could allow your identification. 
In accordance with the rights conferred by current regulations on the Protection of 
Personal Data, you may exercise your rights of access, rectification, limitation of 
treatment, deletion, portability and opposition, directing your request to the principal 
investigator of the study or to the Protection Delegate. of data; directing your request to 
the email lopdvhio@vhio.net. 
In turn, we inform you that you can contact the VHIO Data Protection Delegate by writing 
to the email address dpd.cliente@conversia.es or by calling 902 877 192. 
In accordance with current legislation, you have the right to be informed of the relevant 
data for your health that is obtained in the course of the study. This information will be 
communicated to you if you wish; In the event that you prefer not to be informed, your 
decision will be respected." 
If you need more information about this study, you can contact the researcher in charge, 
Dr. Mirallas of the Medical Oncology Service at omirallas@vhebron.net or by phone at 
934 893 000, ext. 6589.  
 
 
 

 
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INFORMED CONSENT 
Study title: “Multicenter study on clinical and analytical prognostic factors of hospitalized 
patients in oncology, a holistic approach [Plantology].” 
 
I ………………………………………………………………….(name and surnames) 
have read the information sheet that has been given to me and I have understood the 
objectives of the study as well as the potential risks and benefits of my participation in it. 
I was able to ask questions about the study. 
I have spoken with Dr…………………………... I agree to participate according to the 
established conditions and procedures. I understand that my participation is voluntary. I 
understand that my participation is voluntary. I understand that I can withdraw from the 
study: 1. Whenever I want 2. Without having to give an explanation 3. Without this 
affecting my medical care. 
I voluntarily give my consent so that the study can be carried out on possible prognostic 
factors related to cancer in my blood sample, my clinical-analytical data and on the 
responses to the surveys carried out. My identity will be kept secret. 
 
I freely give my consent to participate in the study. 
 
Signature Patient, relative or legal representative (indicate) 
Investigator Signature 
 
 
Date 
 
 
 
 
 
 
 
Date