There are multiple definitions:

1. proton pump inhibitor(English)

   • potent inhibitor of (gastric) acid secretion. Associated with an increased risk for migraine and other severe headache types
   • GER, GERD, REE, IAP, NHANES
   • Mouth, esophagus and stomach, Pharmacology / pharmaceutics, Headache
   • https://www.hea…pump-inhibitors
   • https://doi.org…p.2010.16.4.250
   • https://doi.org…000000000200302

2. physician preference item(English)

   • those items whose selection and use are heavily influenced by a physician
   • PPE
   • Financial issues
   • https://www.ncb…les/PMC2690325/

3. protein-protein interaction(English)

   • proteins can influence each other's production and half-life transcriptionally and post-transcriptionally, exchange reaction products, participate in signal relay mechanisms, or jointly contribute toward specific organismal functions
   • CDNA, GWAS, PWAS, TWAS
   • Proteins, Genomics
   • https://doi.org…1093/nar/gkw937
   • http://string-db.org
   • https://doi.org….08.06.24311572

4. present pain intensity(English)

   • has a 6-point scale ranging from 0 (no pain) to 5 (unbearable pain). Used for the measurement of the intensity of pain at the time of the evaluation
   • VAS, WQXG
   • Pain, Scoring systems/scales
   • https://doi.org…55/2020/1428246

5. public and patient involvement(English)

   • refers to involvement in the development of clinical research initiatives in the UK which effort has been central and is increasing. Whilst initially developed in relation to cancer research and cancer care, this activity has now generalized to all of healthcare research
   • NHS, NIHR
   • Patient-centered (interest group), Organizations (research)
   • https://doi.org…3/annonc/mdr427

6. palliative prognostic index(English)

   • the sum of the PPS and other clinical variables (oral intake, edema, resting dyspnea, and delirium) that are independently predictive of survival. The index can acceptably predict whether or not a patient will survive >3 or >6 weeks
   • PCU, PPS, PKS
   • Prognosis, Oncology, Terminal / palliative care
   • https://doi.org…ncotarget.24826
   • http://doi.org/…-1015-1.00046-1

7. patient preference information(English)

   • by FDA defined as “qualitative or quantitative assessments of the relative desirability or acceptability to patients of specified alternatives or choices among outcomes or other attributes that differ among alternative health interventions” Should be incorporated into decision making. May elevate the patient voice in the medical device product life cycle
   • FDA, PP, MPLC
   • Decision making, Medical technology (assessment)
   • https://doi.org…val.2019.12.005

8. peak power index(English)

   • defined as peak LVOT flow velocity (cm/s)×LVOT area(cm2)×SBP (mm Hg))/EDV(cm3) and is expressed as mmHg/s
   • EDV, LVOT, SBP, PRSW
   • Cardiology
   • https://doi.org…NAHA.105.540500

9. pachymetric progression index(English)

   • calculates the change in corneal thickness over all 360 degrees of the cornea. The progression value at each meridian from the thinnest point is defined as Progression Index and the average of all meridians is illustrated by PPI-Avg
   • CTSP, IVA, PTI, PPI-Avg, PPI-Max, PPI-Min
   • Ophthalmology
   • https://doi.org…ijo.IJO_2111_20

10. postprostatectomy incontinence(English)

    • RARP, ARVUS
    • Prostate, Surgery, Urology
    • https://doi.org…uro.2016.05.032

11. prepulse inhibition(English)

    • refers to acoustic startle
    • MWM, ASR
    • Neuropathy, Brain (dys)function
    • https://doi.org…ntt.2008.09.003

12. patient-physician interaction(English)

    • physician biases toward mental conditions such as depression have been shown to adversely affect medical outcomes
    • GOSCE, OSCE, MCRS, SP
    • Communication, Depression
    • https://doi.org…1606-017-4276-7

13. permanent pacemaker implantation(English)

    • may be required after transcatheter aortic valve replacement
    • PVL, TAVI
    • Cardiology, Therapeutic approaches
    • https://doi.org…ehjqcco/qcaa089

14. psychophysiological interaction(English)

    • refers to model-based assessment of task-dependent functional connectivity
    • AIC, dAIC, DD, fMRI, MRI, CCK, CD36, ENaC, FAT, FCI, FFA, FFQ, FNS, FPD, GCCR, gLMS, GPCR, GPR120, NEFA, ORN, SAFA, TFEQ
    • Physiology, Psychology, Medical imaging, Gustatory system, Nutrition
    • https://doi.org…1111/acer.14888
    • https://doi.org…srev.00061.2021

15. Psychopathic Personality Inventory(English)

    • self-report measures may not be valid indicators of psychopathic traits due to the core features of psychopathy (e.g., lying, deception/manipulation)
    • DAPP-BQ, LSRP, PPI-R, SNAP
    • Psychology, Pathology, Questionnaire
    • https://doi.org/10.1037/a0026482