Does She Hurt? Pain in the Elderly | The Pained Brain, Chapter 16

Delirium in elderly patients · Pain

Delirium in Elderly Patients: Rule Out Pain Before Sedation

In elderly patients with dementia, untreated pain is a measurable driver of delirium: across 30 studies of older inpatients, severe pain carried 3.42 times the odds. Pain belongs on the workup before any sedative is ordered.

Acute confusion and agitation in an older patient with dementia are usually treated as behavior. The evidence places untreated pain among the drivers, and the workup that separates the two can be built into routine geriatric screening.

Delirium in elderly patients with dementia is usually charted as a behavioral event and managed as one, although a measurable share of it tracks pain that nobody assessed. The distinction changes the order: an analgesic workup before a sedative, and baselines that let a change in cognition or balance be recognized as a change. The chapter video, Does She Hurt? Pain in the Elderly, presents chapter 16 of The Pained Brain by Dr. Gurpreet Singh Padda, MD, MBA, MHP, and Dr. KrisJay Fucanan, MD. Each study, with what it can and cannot show, is summarized in the book companion for chapter 16.

Is pain a risk factor for delirium in elderly patients?

Among 541 hip-fracture patients without delirium at enrollment, 16 percent became delirious. In cognitively intact patients, severe pain carried a relative risk of 9.0, and receiving under 10 milligrams of parenteral morphine equivalents a day carried 5.4; too much pain and too little analgesia behaved as the same exposure. Pooled across 30 studies of older inpatients, pain at rest carried an odds ratio of 2.14 for delirium and severe pain 3.42, while pain on movement did not reach significance. Before elective orthopedic surgery, in 200 patients with a median age of 69, preoperative chronic pain independently predicted postoperative delirium at an adjusted odds ratio of 2.488.

The inpatient picture in established neurocognitive disorder is starker. In 292 hospitalized patients with a mean age of 87.8, observational pain behaviors were present in 62.4 percent, and only 20.3 percent of those were receiving an analgesic at admission. Three-month mortality carried an adjusted hazard of 2.39. That is a single-center observational association, not a causal estimate, but it describes a group in which pain is common, untreated and prognostically meaningful.

Why is pain under-recorded where agitation orders are written?

Only 24.4 percent of nursing-home admissions with severe cognitive impairment were assessed by staff observation rather than a self-report instrument they could not use. When the two approaches were compared in separate samples, self-report recorded moderate to severe pain in 9.60 percent and staff observation in 34.04 percent. The chart therefore under-records pain precisely where agitation orders are written.

The trial evidence is directional and honest in both directions. In 352 residents with dementia and agitation across 60 Norwegian units, a stepwise analgesic protocol reduced agitation by 17 percent, a treatment effect of −7.0, and the effect faded to −3.2 by week 12 after withdrawal. Anxiety and irritability items did not change significantly. Scheduled acetaminophen given to 95 residents selected for low quality of life rather than pain or agitation did nothing. Selection is the variable: treat identified pain, not everyone.

Meanwhile the sedative has a number attached. In veterans with dementia, the number needed to harm for one excess death within 180 days was 26 for haloperidol and 50 for quetiapine.

What drives missed pain and sedative harm in older patients?

The first biological driver is nociception itself, which in dementia surfaces as resistance to care, calling out and nighttime restlessness rather than a verbal report. The second is pharmacokinetic: hepatic clearance of most drugs falls 10 to 40 percent with age and the aging brain is more sensitive at a given level, so each sedating agent adds more than its dose suggests. Emergency visits for medication harm ran 12.1 per 1,000 adults over 65 against 5.0 in younger adults. The structural driver is measurement design. When a quality metric tracked antipsychotics alone, prescribing shifted toward other psychotropics. And in the one emergency department trial of a dementia pain scale, 602 older adults with suspected fractures waited a median of 83 minutes for analgesia against 82. A scale without an attached order changes the chart, not the patient.

Dr. Padda’s own position is the one he reaches after decades of practice: the medication list of an older patient is itself a diagnosis to be read, and the answer to a behavior is a search for its generator.

Where Measura fits: baselines that make change visible

Measura [Cardiometabolic and Autonomic Health Analysis] is a testing service. It performs no procedures and no treatment, does not diagnose delirium or measure pain, and returns results to the ordering physician. Its role is the reference record that makes a later change interpretable.

Cognition. A cognitive assessment documents memory and executive function at baseline, so an acute decline can be distinguished from the trajectory. It is not a pain instrument, and a score does not stand in for observational pain assessment.
Orthostatic physiology. Continuously measured initial orthostatic hypotension appeared in 29.0 percent of adults 65 and over against 5.6 percent with intermittent readings. Cardiac autonomic reflex tests document heart rate and blood pressure responses to position change and breathing.
Balance. Pain in two or more sites raised fall rates 1.53-fold in adults 70 and older; vestibular and balance testing documents the fall-risk side of that equation.
Muscle and metabolism. Sarcopenia and chronic pain co-occur at an odds ratio of 1.52, and in patients 65 and over grip strength predicted epidural response at 1.142 per kilogram, with thresholds of 26.5 kg in men and 16.5 kg in women. Bioimpedance body composition and laboratory panels document lean mass and the glycemic picture; 29.2 percent of Americans over 65 have diabetes and 48.8 percent prediabetes.

Standing orders, the annual wellness visit and documentation

The annual wellness visit already asks for cognitive status and fall risk, which is where a cognitive baseline, a standing blood pressure and balance findings belong, recorded before the admission that makes them urgent. The cognitive assessment and fall prevention pairing keeps both in one encounter. A standing order can specify that new agitation or acute confusion in a patient with dementia triggers an observational pain assessment and a medication review before any sedating agent is added, which converts the scale into an action. Documentation supports HEDIS and value-based care reporting as a record of care delivered, not as the reason for it.

What the evidence does not settle

Much of this is observational, and the trials that would settle it have not enrolled patients in their late eighties. Deprescribing alone did not reduce falls in community trials at high certainty, and dose changes cut both ways: in older adults on long-term opioid therapy, rapid tapering lowered overdose but raised all-cause mortality 1.28-fold. Removing a drug is a decision about a list; treating the patient requires finding the generator. Family-facing guidance on the standing reading is in what a seated blood pressure misses, and the earlier argument on injections is metabolic screening before repeat joint injections.

Frequently asked questions

How strongly does pain predict delirium in older inpatients?

Pooled across 30 studies, pain at rest roughly doubled the odds of delirium and severe pain more than tripled them, while pain on movement was not significant. After hip fracture, severe pain in cognitively intact patients carried a relative risk of 9.0, with a wide interval. The inputs are observational and heterogeneous. The clinical rationale for measuring before acting applies directly.

Should new agitation in dementia prompt a pain workup before an antipsychotic?

The cluster-randomized Norwegian trial supports it: a stepwise analgesic protocol reduced agitation by 17 percent, and the effect faded when analgesia was withdrawn. Blanket scheduled acetaminophen in residents not selected for pain did nothing, so the workup should identify pain rather than assume it. Sedating agents carry measurable mortality. Specialty applications describes use in geriatric practice.

Can a cognitive assessment detect pain or delirium?

No. A cognitive assessment documents memory and executive function; it does not measure pain and does not diagnose delirium. Its value here is as a baseline, so an acute change can be recognized against a documented trajectory rather than attributed to progression. Pain in nonverbal patients still requires an observational tool. Cognitive assessment outlines what the test covers.

Why document orthostatic physiology in patients with dementia who fall?

Continuous measurement found initial orthostatic hypotension in 29.0 percent of adults 65 and over, against 5.6 percent with intermittent readings, and antihypertensive intensity was associated with serious fall injury in older adults. Pooled trials did not show excess falls with treatment, so the finding informs a prescriber review rather than withdrawal. Cardiac autonomic reflex tests describes the measurement.

Which older patients belong on this standing order?

Patients with dementia or cognitive impairment who develop new agitation, acute confusion, falls or declining mobility, and those carrying several sedating or pressure-lowering medications, are the practical core. Hip fracture and vertebral fracture histories raise the priority. The order should link assessment to an action. Practice-level selection criteria summarize who to test.

Why is pain missed in older patients with dementia?

Pain in dementia tends to show up as resistance to care, calling out and nighttime restlessness rather than a spoken complaint. Charts rely on self-report, which these patients cannot give. Only 24.4 percent of nursing-home admissions with severe cognitive impairment were assessed by staff observation, and observation recorded moderate to severe pain far more often than self-report did, 34.04 percent against 9.60 percent.

What are the risks of antipsychotics for agitation in dementia?

In veterans with dementia, the number needed to harm for one excess death within 180 days was 26 for haloperidol and 50 for quetiapine. Older patients also clear most drugs 10 to 40 percent more slowly, and the aging brain is more sensitive at a given level, so each sedating agent adds more than its dose suggests. That is why the pain workup comes first.

Build baselines into geriatric screening

See how the Measura protocol adds cognitive, autonomic, balance and body composition baselines to geriatric workflows, with results returned to the ordering physician.

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References

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