Sleep & Health

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Every con­di­tion page here starts with data, not guess­work. This sec­tion is being built around Stan­ford Med­i­cines SleepFM study, pub­lished Jan­u­ary 2026 in Nature Med­i­cine, which trained an AI mod­el on near­ly 600,000 hours of sleep data from 65,000 patients to flag risk for more than 130 health con­di­tions from a sin­gle nights sleep. Can­cers, preg­nan­cy com­pli­ca­tions, heart and cir­cu­la­to­ry dis­ease, Parkin­sons, demen­tia, men­tal health con­di­tions — the mod­el found sig­nals for all of them, often before any­thing else did.

We are turn­ing that research into a real library: one page per con­di­tion, plain lan­guage, sourced. It is com­ing. The sci­ence already exists — we are just build­ing the front door to it.

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Want the stud­ies behind these con­di­tion links as they pub­lish? See Research. Ready to find a device or clin­ic to act on a diag­no­sis? Check the Direc­to­ry. And if you think insur­ers and providers should be doing more with this sci­ence, read what we’re push­ing for in Advo­ca­cy.

The Condition Library

• Abnor­mal­i­ty of Gait — Dif­fi­cul­ty walk­ing nor­mal­ly, which can stem from neu­ro­log­i­cal, mus­cu­lar, or joint-relat­ed caus­es, espe­cial­ly in old­er adults.Sleep research — includ­ing Stan­ford’s…
• Alzheimer’s Dis­ease — A pro­gres­sive brain dis­ease and the most com­mon cause of demen­tia, marked by wors­en­ing mem­o­ry loss and cog­ni­tive decline.Sleep research…
• Ane­mia — A short­age of healthy red blood cells or hemo­glo­bin, lead­ing to fatigue and weak­ness, with many pos­si­ble under­ly­ing causes.Sleep research…
• Angi­na — Chest pain or dis­com­fort caused by reduced blood flow to the heart mus­cle, often a warn­ing sign of under­ly­ing heart…
• Aor­tic Aneurysm — An abnor­mal bulge in the wall of the aor­ta, the body’s main artery, which can be life-threat­en­ing if it ruptures.Sleep…
• Ath­er­o­scle­ro­sis — Hard­en­ing and nar­row­ing of the arter­ies from plaque buildup, a root cause of heart attacks, strokes, and periph­er­al vas­cu­lar disease.Sleep…
• Atri­al Fib­ril­la­tion and Flut­ter — Irreg­u­lar, often rapid heart rhythms orig­i­nat­ing in the heart’s upper cham­bers, which raise the risk of stroke and heart failure.Sleep…
• Autism Spec­trum Dis­or­der — A devel­op­men­tal con­di­tion affect­ing com­mu­ni­ca­tion, behav­ior, and social inter­ac­tion, appear­ing on a wide spec­trum of presentation.Sleep research — includ­ing Stan­ford’s…
• Breast Can­cer — A can­cer that forms in the cells of the breast, one of the most com­mon can­cers affect­ing women.Sleep research —…
• Cataracts — A cloud­ing of the eye­’s nat­ur­al lens that devel­ops with age, caus­ing blurred vision that can be cor­rect­ed with surgery.Sleep…
• Chron­ic Kid­ney Dis­ease-Relat­ed Ane­mia — A short­age of healthy red blood cells that com­mon­ly devel­ops as kid­ney func­tion declines over time.Sleep research — includ­ing Stan­ford’s…
• Chron­ic Leg and Foot Ulcers — Slow-heal­ing wounds on the low­er legs or feet, often linked to poor cir­cu­la­tion or diabetes.Sleep research — includ­ing Stan­ford’s SleepFM…
• Coro­nary Ath­er­o­scle­ro­sis — A buildup of fat­ty plaque inside the coro­nary arter­ies that nar­rows blood flow to the heart over time.Sleep research —…
• Delir­i­um and Cog­ni­tive Dis­or­ders — Sud­den, fluc­tu­at­ing con­fu­sion and dis­ori­en­ta­tion, often trig­gered by ill­ness, surgery, or med­ica­tion, and dis­tinct from long-term dementia.Sleep research — includ­ing…
• Demen­tia — An umbrel­la term for a decline in mem­o­ry, think­ing, and rea­son­ing severe enough to inter­fere with dai­ly life, with sev­er­al…
• Devel­op­men­tal Delays and Dis­or­ders — A broad­er-than-typ­i­cal gap in reach­ing phys­i­cal, learn­ing, speech, or behav­ioral mile­stones in childhood.Sleep research — includ­ing Stan­ford’s SleepFM study —…
• Dia­bet­ic Retinopa­thy — Dam­age to the blood ves­sels of the reti­na caused by long-term dia­betes, a lead­ing cause of vision loss in adults.Sleep…
• Heart Fail­ure — A con­di­tion in which the heart does­n’t pump blood as well as it should, lead­ing to fatigue and short­ness of…
• Hyper­ten­sion — Per­sis­tent­ly ele­vat­ed blood pres­sure that, left unman­aged, rais­es the risk of heart dis­ease, stroke, and kid­ney disease.Sleep research — includ­ing…
• Hyper­ten­sive Heart Dis­ease — Heart prob­lems — includ­ing thick­en­ing of the heart mus­cle and heart fail­ure — caused by long-term high blood pressure.Sleep research…
• Hypoten­sion — Abnor­mal­ly low blood pres­sure, which can cause dizzi­ness, faint­ing, or in severe cas­es, shock.Sleep research — includ­ing Stan­ford’s SleepFM study…
• Infer­til­i­ty — Dif­fi­cul­ty con­ceiv­ing after a year or more of try­ing, which can stem from a range of male or female repro­duc­tive…
• Intracra­nial Hem­or­rhage — Bleed­ing with­in the skull or brain tis­sue, a seri­ous and often sud­den med­ical emergency.Sleep research — includ­ing Stan­ford’s SleepFM study…
• Ischemic Heart Dis­ease — Reduced blood flow to the heart mus­cle due to nar­rowed coro­nary arter­ies, the under­ly­ing cause of angi­na and heart attacks.Sleep…
• Mac­u­lar Degen­er­a­tion — An age-relat­ed eye con­di­tion that dam­ages the reti­na’s cen­tral por­tion, grad­u­al­ly blur­ring cen­tral vision.Sleep research — includ­ing Stan­ford’s SleepFM study…
• Mild Cog­ni­tive Impair­ment — A notice­able but mod­est decline in mem­o­ry or think­ing skills that is greater than typ­i­cal for one’s age, some­times pre­ced­ing…
• Myocar­dial Infarc­tion (Heart Attack) — Dam­age to heart mus­cle caused by a sud­den block­age of blood flow to the heart.Sleep research — includ­ing Stan­ford’s SleepFM…
• Obstruc­tive Chron­ic Bron­chi­tis — Long-term air­way inflam­ma­tion and mucus buildup that nar­rows the air­ways and caus­es a per­sis­tent cough, part of the COPD spectrum.Sleep…
• Open-Angle Glau­co­ma — A com­mon form of glau­co­ma that grad­u­al­ly dam­ages the optic nerve, often with­out ear­ly symp­toms, and can lead to vision…
• Osteoarthri­tis — The most com­mon form of arthri­tis, caused by the grad­ual break­down of joint car­ti­lage, lead­ing to pain and stiffness.Sleep research…
• Osteo­poro­sis — A con­di­tion in which bones become weak and brit­tle, increas­ing the risk of frac­tures, espe­cial­ly in old­er adults.Sleep research —…
• Parkinson’s Dis­ease — A pro­gres­sive ner­vous-sys­tem dis­or­der that affects move­ment, often caus­ing tremor, stiff­ness, and slowed motion.Sleep research — includ­ing Stan­ford’s SleepFM study…
• Periph­er­al Vas­cu­lar Dis­ease — Nar­rowed blood ves­sels out­side the heart and brain, most often affect­ing the legs, that reduce blood flow to the limbs.Sleep…
• Post-Trau­mat­ic Stress Dis­or­der — A men­tal health con­di­tion trig­gered by expe­ri­enc­ing or wit­ness­ing a trau­mat­ic event, marked by intru­sive mem­o­ries, avoid­ance, and height­ened anxiety.Sleep…
• Prostate Can­cer — A can­cer that devel­ops in the prostate gland, among the most com­mon can­cers in men, often slow-growing.Sleep research — includ­ing…
• Pul­monary Embolism — A sud­den block­age in a lung artery, usu­al­ly caused by a blood clot that trav­eled from else­where in the body…
• Pul­monary Heart Dis­ease — Strain on the right side of the heart caused by high blood pres­sure in the lungs’ arter­ies, often linked to…
• Res­pi­ra­to­ry Fail­ure — A con­di­tion in which the lungs can’t bring in enough oxy­gen or remove enough car­bon diox­ide, requir­ing urgent med­ical attention.Sleep…
• Skin Can­cer (Melanoma & Squa­mous Cell) — Can­cers that devel­op in skin cells, rang­ing from high­ly treat­able when caught ear­ly to aggres­sive if melanoma spreads.Sleep research —…
• Stroke — A sud­den inter­rup­tion of blood flow to the brain, which can dam­age brain tis­sue and cause last­ing neu­ro­log­i­cal effects.Sleep research…
• Type 1 Dia­betes — An autoim­mune con­di­tion in which the body stops pro­duc­ing insulin, requir­ing life­long insulin ther­a­py to man­age blood sugar.Sleep research —…
• Type 2 Dia­betes — A chron­ic con­di­tion in which the body does­n’t use insulin prop­er­ly, lead­ing to ele­vat­ed blood sug­ar and, over time, dam­age…
• Uter­ine Fibroids and Growths — Non­cancer­ous growths of the uterus that are com­mon in women of repro­duc­tive age and can cause pain or heavy bleeding.Sleep…
• Vas­cu­lar Demen­tia — A form of demen­tia caused by reduced blood flow to the brain, often fol­low­ing strokes or nar­rowed blood vessels.Sleep research…