Research reference only. BioConst updates and corrects content over time, but it cannot replace clinician-guided diagnosis, treatment, medication, or testing decisions.
Variables
Medical Wiki
Reusable medical variables for BioConst condition pages. These entries explain terms and judgment background; they do not interpret personal results.
Bone variables
Open wiki entry25-hydroxyvitamin DThe vitamin D blood test most often used to assess vitamin D status.Open wiki entryAlkaline phosphataseAn enzyme signal that can come from bone, liver, bile ducts, or other tissues.Open wiki entryBMDBone mineral density: a measurement result, not a standalone diagnosis.Open wiki entryBone scanA nuclear medicine imaging test used in selected bone disease and metastasis contexts.Open wiki entryCRPAn inflammation marker that can support infection/inflammation context but cannot identify the cause alone.Open wiki entryCTXA bone resorption marker that is timing-sensitive and context-sensitive.Open wiki entryCultureA microbiology clue used to identify organisms in infection contexts.Open wiki entryDXA / DEXAA low-dose X-ray method used to estimate bone mineral density, usually at the hip and spine.Open wiki entryeGFR / kidney functionKidney function context that can change phosphate, calcium, PTH, vitamin D, and bone turnover meaning.Open wiki entryESRA nonspecific inflammation marker sometimes used with CRP and other clues.Open wiki entryFracture and fall historyPast low-trauma fractures and falls often matter more than any single scan number.Open wiki entryFRAXA fracture-risk model clinicians may use; BioConst references the concept but does not embed a calculator.Open wiki entryMRIAn imaging method that can show marrow, soft tissue, early osteonecrosis, infection, or occult fracture context.Open wiki entryP1NPA bone formation marker used as context, not as a standalone diagnosis.Open wiki entryPhosphateA blood electrolyte tied to bone mineral, kidney function, PTH, and vitamin D context.Open wiki entryPTHParathyroid hormone: a calcium-phosphate control signal that must be read with calcium and kidney context.Open wiki entrySerum calciumBlood calcium is tightly regulated and does not directly tell how much calcium is in bone.Open wiki entryT-scoreA comparison between measured BMD and a young-adult reference database, mainly used in older adult contexts.Open wiki entryVertebral fracture assessmentA low-dose lateral spine image often performed on a DXA system to look for vertebral compression fractures.Open wiki entryX-rayA basic imaging method for bone shape, fractures, sclerosis, lytic change, and deformity context.Open wiki entryZ-scoreA comparison between measured BMD and an age-matched reference group.
Brain variables
Open wiki entryActivities of daily livingEveryday function is the practical boundary between ordinary forgetfulness, MCI, and dementia-level impairment.Open wiki entryBeta-amyloidA protein fragment that can accumulate as plaques in Alzheimer disease and is targeted by some approved antibodies.Open wiki entryARIAAmyloid-related imaging abnormalities, including edema or bleeding findings that can occur with anti-amyloid treatment.Open wiki entryAnti-amyloid antibodiesA drug class targeting amyloid beta in certain early Alzheimer disease contexts.Open wiki entryBrain atrophyLoss of brain volume that can become widespread in later Alzheimer disease as neurons die and networks fail.Open wiki entryCognitive testingStructured tests of memory, thinking, language, judgment, and other brain functions.Open wiki entryDepression, delirium, and medication contextMood, acute confusion, medicines, and medicine interactions can change memory and thinking, especially in older adults.Open wiki entryEpisodic memoryMemory for personal events and experiences, often the type people mean when they say they are becoming forgetful.Open wiki entryHearing and vision inputSensory loss can affect brain health and daily cognition because less reliable input changes how people function and remember.Open wiki entryHippocampus / entorhinal memory networkA memory-related brain network central to forming new memories and often affected early in Alzheimer disease.Open wiki entryMCIA clinical category for memory or thinking problems beyond peers, with daily independence mostly preserved.Open wiki entrySleep and memorySleep supports brain function, and NIA lists seven to nine hours as a general older-adult brain-health target.Open wiki entrySynaptic plasticityThe ability of neuronal connections to change strength with experience; a core mechanism discussed in memory biology.Open wiki entryTauA microtubule-related protein that can form neurofibrillary tangles in Alzheimer disease.Open wiki entryVascular risk and brain healthBlood pressure, diabetes, cholesterol, stroke, and vascular disease can affect cognitive health and dementia risk.