The information on the ProQolid website is structured in two levels:
This level is available to all visitors at no charge. For each instrument, it provides the following brief and descriptive information:

[a] Pathology: the term "pathology" refers to a large therapeutic area and can cover several diseases. On the other hand, the term "disease" refers to a specific, precisely defined condition. The ProQolid list of pathologies/diseases is in accordance with the established classification system well-known to scientists (MESH: Medical Subject Headings of the National Library of Medicine). However some conditions such as "menopause" are related to a pathology so that they can be searched through the advanced search engine.
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Bacterial infections and mycoses
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Infections caused by bacteria and fungi, general, specified, or unspecified
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Cardiovascular diseases
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Pathological conditions involving the cardiovascular system including the heart; the blood vessels; or the pericardium
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Congenital, hereditary and neonatal diseases and abnormalities
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Diseases existing at birth and often before birth, or that develop during the first month of life (infant, newborn, diseases), regardless of causation. Of these diseases, those characterized by structural deformities are termed congenital abnormalities
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Digestive system diseases
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Diseases in any part of the gastrointestinal tract or the accessory organs (liver; biliary tract; pancreas)
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Disorders of environmental origin
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Disorders representing collectively the results of assault by external forces, rather than by organic or physiologic dysfunction or by pathogens (e.g. substance-related disorders, wounds and injuries)
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Endocrine system diseases
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Pathological processes of the endocrine glands, and diseases resulting from abnormal level of available hormones
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Eye diseases
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Diseases pertaining to the eye
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Female genital disease and pregnancy complications
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Pathological processes of the female reproductive system (genitalia, female), and disorders related to pregnancy. Female sexuality and menopause are included
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Hemic and Lymphatic diseases
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Hematologic diseases and diseases of the lymphatic system collectively. Hemic diseases include disorders involving the formed elements (e.g., erythrocyte aggregation, intravascular) and chemical components (e.g., blood protein disorders); lymphatic diseases include disorders relating to lymph, lymph nodes, and lymphocytes
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Immune system diseases
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Disorders caused by abnormal or absent immunologic mechanisms, whether humoral, cell-mediated, or both
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Male Genital diseases
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Pathological processes involving the male reproductive tract (genitalia, male). Male sexuality is included
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Musculoskeletal diseases
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Diseases of the muscles and their associated ligaments and other connective tissue and of the bones and cartilage viewed collectively
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Neoplasms
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New abnormal growth of tissue. Malignant neoplasms show a greater degree of anaplasia and have the properties of invasion and metastasis, compared to benign neoplasms
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Nervous System diseases
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Diseases of the central and peripheral nervous system. This includes disorders of the brain, spinal cord, cranial nerves, peripheral nerves, nerve roots, autonomic nervous system, neuromuscular junction, and muscle
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Nutritional and metabolic diseases
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A collective term for nutritional disorders resulting from poor absorption or nutritional imbalance, and metabolic disorders resulting from defects in biosynthesis (anabolism) or breakdown (catabolism) of endogenous substances
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Otorhinolaryngologic diseases
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Pathological processes of the ear, the nose, and the throat, also known as the ENT diseases
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Parasitic diseases
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Infections or infestations with parasitic organisms. They are often contracted through contact with an intermediate vector, but may occur as the result of direct exposure
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Pathological conditions signs and symptoms
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Abnormal anatomical or physiological conditions and objective or subjective manifestations of disease, not classified as disease or syndrome (e.g. inflammation, alopecia, fatigue, pain)
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Psychiatry/Psychology
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Psychiatry: the medical science that deals with the origin, diagnosis, prevention and treatment of mental disorders / Psychology: the science dealing with the study of mental processes and behavior
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Respiratory tract diseases
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Diseases pertaining to the respiratory system
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Skin and connective tissue diseases
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A collective term for diseases of the skin and its appendages and of connective tissue
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Stomatognathic diseases
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General or unspecified diseases of the stomatognathic system, comprising the mouth, teeth, jaws, and pharynx
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Surgical procedures, operative
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Operations carried out for the correction of deformities and defects, repair of injuries, and diagnosis and cure of certain diseases
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Urologic diseases
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Pathological processes of the urinary tract in both males and females
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Virus diseases
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A general term for diseases produced by viruses
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The list of diseases is available here.
[b] Population: this field describes the target population of the instrument as selected by the following descriptors:
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Adolescent
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Adult
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All
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Caregivers
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Female
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Geriatrics
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Male
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Pediatrics (neonate, infant and child)
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Terminal patients
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[c] Type of instrument: this category refers to the major concept assessed by the instrument:
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Health-Related Quality of life (HRQL) (incl. health status)
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HRQL is multidimensional and represents the patient's evaluation of a health condition and its treatment on daily life: physical function, psychological function, social function, role function, emotional function, well-being, vitality, health status etc.
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Health-Related Quality of end of life
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Same as HRQL at the end of life
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Patient satisfaction
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Evaluation of treatments, patients preference, health care delivery systems and professionals, patient education programs and medical devices
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Physical functioning
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Physical limitations and activity restrictions, e.g., self-care, walking, mobility, sleep, sexual, disability
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Psychological functioning (incl. coping)
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Positive or negative affect and cognitive, e.g. anger, alertness, self-esteem, sense of well-being, distress, coping
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Signs and symptoms
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Reports of physical and psychological symptoms or sensations not directly observable, e.g., energy and fatigue, nausea, irritability
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Social functioning (incl. work)
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Limitations in work or school, participation in community
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Treatment adherence
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Reports or observations of actual use of treatments
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Utility
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Generic measures of HRQol with societal reference weights for their classification systems that can help to inform health-care resource allocation.
Utilities provide a useful summary index of overall QoL relative to full health (utility = 1) and death (utility = 0)
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[d] Mode of administration: the following modes of administration may be cited:
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Caregiver-administered
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A caregiver asks the patient questions and completes the instrument from the patient’s perspective
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Computer-administered
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The instrument is completed on the computer
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Electronic version
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The instrument is completed on an electronic device. The data is compiled automatically
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IVR-version
(IVR: Interactive Voice Response System)
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The subject completes the instrument using a software application which enables users to enter data on a telephone keypad or to input information by voice
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Interviewer-administered
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An interviewer asks the patient questions and completes the instrument from the patient’s perspective
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Nurse-rated
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The instrument is completed by a nurse from his/her observation of the patient
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Clinician-rated
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The instrument is completed by a clinician from his/her observation of the patient
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Proxy-administered
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A proxy asks the patient questions and completes the instrument from the patient’s perspective
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Proxy-rated
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The instrument is completed by a proxy from his/her observation of the patient
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Self-administered
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The instrument is completed by the patient himself
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Telephone-administered
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During a telephone interview an interviewer asks the patient questions and completes the instrument from the patient’s perspective
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[e] Existence of a database: a database is created by collecting and pooling the instrument's data from national and international studies.
[f] List of existing translations: the translations may not have undergone a full linguistic validation process. Please check status of translations with Mapi Research Trust / the developers / copyright holders / distributors
- Level 2. Restricted access (for ProQolid's members only)
- Level 2.1: Practical information
This advanced level, which is accessible to subscribers only, presents a greater degree of practical information on the instruments and, when available, includes the review copy of the instrument, its translations and the user manual:
N.B: ProQolid provides descriptive information on the instruments. This content is based on information collected in the literature and validated by the authors of the questionnaires. The adequacy of study methodology and psychometric properties is not evaluated. The instruments presented in ProQolid may have specific conditions of use. Copies of the instruments are presented for a review purpose only. The instruments themselves may require direct contact with, and additional payment of fees to the instruments' copyright holders.

- Level 2.2: The PRO database identification form
To facilitate the researcher’s access to information on available datasets, we aim to identify, list and describe existing PRO databases created from national or international clinical studies. By making this available, data interpretation can be improved through access to comparative data from studies using the same or different PRO instruments. The focus of the resulting collection is to provide practical information available on the Internet and not access to the data itself.
For over 50 instruments, a PRO database created from the collection and centralization of instrument's data from national and international studies was identified.
The general description of each database includes its location, conditions of access and the contact details of the person or organization for more information.
More specific information is provided on the structure of the database, the surveyed population(s) and the various study(ies) in which the instrument was used. Furthermore, reference is made to population size and availability of data per study, age group, sex, ethnicity, disease, condition severity or country.
Updates:
* All instruments described in the database are updated at least once a year in direct collaboration with their developers
* New information is provided on each instrument
* New instruments are added each year.
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