In older adults, pneumonia often doesn’t look like a chest infection at first: there may be no fever and little cough, and the first signs are new confusion, a fall, unusual sleepiness, or simply not eating. If an older relative suddenly “isn’t themselves”, check their breathing rate and, if you have one, their oxygen level, and get a doctor to see them the same day.
Pneumonia is a lung infection that can turn serious quickly in later life. Spotting it a day earlier can make a real difference, and families are often the first to notice.
Why pneumonia looks different in older people
Most of us picture pneumonia as high fever, a heavy cough and chest pain. That picture is often wrong after 65. A review of bacterial pneumonia in older adults found:
- Fever may be absent in 25% to 55% of older people with pneumonia
- In one group of 48 older patients, only 35% had both fever and cough
- In a study of 1,812 patients, the number of typical symptoms people reported went down as age went up
- A similar share present with altered mental status (confusion), and in care-home residents, up to 73% of cases presented with confusion
- Other signs include new or repeated falls, a drop in day-to-day functioning and loss of appetite
The NHS pneumonia page also notes that feeling confused is common in older people with pneumonia. Because the signs are vague, they’re easily put down to “old age”, a bad night, or the cold weather.
Early signs families miss
Use this as a checklist when an older person seems unwell, especially after a cold or flu:
| What you might notice | Why it matters |
|---|---|
| New confusion, muddled talk, or drowsiness during the day | Confusion is one of the commonest ways pneumonia shows up in older people |
| A fall, or suddenly unsteady on their feet | New falls are listed among atypical signs of pneumonia |
| Not eating, refusing tea or water | Loss of appetite can be an early sign, and poor drinking can lead to dehydration |
| Can’t manage things they did last week (getting to the toilet, dressing) | Sudden functional decline is a recognised warning sign |
| Breathing faster than usual at rest | A breathing rate above 25 a minute was a sensitive sign of pneumonia in the review above |
| A cough with yellow or green phlegm, or breathlessness | Classic chest infection signs, when they are present |
| Feeling cold or shivery, even without a high reading on the thermometer | Many older adults with pneumonia have no fever |
How to count breaths: while the person is resting and not talking, watch their chest or tummy rise and fall for a full 60 seconds. Each rise counts as one breath. Write the number down with the time.
Who is at higher risk?
The NHS says people over 65 and those with heart disease or a long-term lung condition are at risk of getting seriously ill. The older-adults review adds these risk factors:
- Long-term conditions such as heart disease, lung disease (including COPD), diabetes and cancer
- Smoking
- Swallowing problems (dysphagia), which let food, drink or saliva slip into the lungs; in one study, 91% of older adults with community-acquired pneumonia had swallowing problems
- A recent bout of flu, which can be followed by a bacterial infection, especially in those with other conditions
Flu season adds to the risk; our post on when flu season starts and how to protect yourself explains the timing. If you’re not sure whether an older relative’s illness started as flu, our guide to early H1N1 signs and testing may help.
Polluted air also stresses older lungs, so the smoggy weeks of November are a time to be extra watchful. Our articles on protecting your lungs at home when AQI is above 300 and on whether N95 masks work against pollution cover the practical side.
What doctors look at: the CURB-65 score
When an older person with pneumonia reaches a hospital, doctors often use a simple score called CURB-65 to judge how serious it is. It was published in the journal Thorax in 2003. Each item scores one point:
- Confusion
- Urea (a blood test for kidney function) above 7 mmol/L
- Respiratory rate of 30 or more breaths a minute
- Blood pressure low: systolic below 90 or diastolic 60 or below
- Age 65 or over
In the original study, the risk of dying within 30 days rose with each point, from under 1% at a score of 0 to 57% at a score of 5. The older-adults review notes that a score of 2 or more suggests a person needs hospital care.
Why tell you this? Not so you can score a relative at home. You can’t measure urea, and anyone over 65 already starts with one point. It’s to show what doctors take seriously: confusion and fast breathing are both on the list. If you notice either, say so clearly when you call the doctor.
Checking oxygen with a pulse oximeter
A fingertip pulse oximeter measures how much oxygen is in the blood (SpO2). It can be a useful extra check at home, but it doesn’t replace watching the person.
How to get a reliable reading. The US FDA’s guidance is to keep the hand warm, relaxed and below heart level, remove nail polish from that finger, sit still, and wait until the number stops changing. Write down each reading with the date and time so you can see a trend.
What the numbers mean. The FDA says oxygen saturation is between 95% and 100% for most healthy people. For acutely ill patients, the British Thoracic Society’s oxygen guideline sets a target range of 94% to 98%, and says a sudden fall of 3 percentage points or more, or a reading below a person’s target range, should prompt a fuller medical assessment. In the pneumonia review, an oxygen level below 94% picked up pneumonia well in care-home residents.
So, in practice:
- Know your relative’s usual reading when they are well
- A reading of 93% or lower, or a drop of 3 points or more from their usual, in someone who seems unwell, needs a doctor the same day
- A low reading with breathlessness, confusion or blue lips is an emergency
Important limits. People with COPD may normally run lower; the BTS target for those at risk of carbon dioxide build-up is 88% to 92%, so ask their doctor what’s normal for them. The FDA notes that skin pigmentation, poor circulation, cold skin, skin thickness, tobacco use and nail polish can all affect accuracy. And some people with low oxygen have few symptoms, so a “normal” number never cancels out a person who looks unwell.
Prevention, briefly
Vaccines are the main protection, and we’ll cover adult vaccines in more detail in a separate article this week. In short:
- Pneumococcal vaccine: the US CDC recommends pneumococcal vaccination for all adults aged 50 or over, and for younger adults with certain risk conditions
- Flu vaccine every year: the WHO recommends annual flu vaccination for people over 65 and people with chronic medical conditions, among others
Ask your family doctor which vaccines and schedule suit your relative. Beyond vaccines: stopping smoking, keeping diabetes and heart or lung conditions under control, and getting a swallowing assessment if someone often coughs or chokes while eating or drinking.
Go to hospital if…
Call 112 or go to the emergency department straight away if an older person has any of these. Most are on the NHS list of emergency signs for pneumonia:
- Struggling to breathe: gasping, choking, or unable to speak in sentences
- Pale, blue or blotchy skin, lips or tongue
- Coughing up blood
- Sudden confusion, or they’re very drowsy and hard to wake
- Breathing very fast at rest (30 or more breaths a minute is one of the CURB-65 danger signs)
- A low oxygen reading together with any of the signs above
See a doctor the same day if they have a cough with fever or phlegm, new breathlessness, chest pain that comes and goes, have stopped eating or drinking, or have had a fall and “aren’t right” afterwards.
Frequently asked questions
Can an older person have pneumonia without a fever?
Yes. Fever is missing in roughly a quarter to over half of older adults with pneumonia, so a normal temperature doesn’t rule it out.
Why does pneumonia cause confusion in the elderly?
New confusion is one of the commonest ways pneumonia shows itself in this age group; in care-home residents, up to 73% of cases started this way. It’s also one of the danger signs doctors score, so it’s always a reason to get medical help.
What oxygen level is dangerous in pneumonia?
Most healthy people read 95% to 100%. A reading of 93% or lower, or a drop of 3 points from someone’s usual, needs a same-day doctor review, and a low reading with breathing difficulty or confusion is an emergency. People with COPD may have a lower normal.
Is CURB-65 something families can use at home?
No. It needs a blood test and is meant for doctors. What’s useful to know is that confusion and fast breathing are two of its warning signs.
Can older adults recover from pneumonia at home?
Some can, if a doctor has assessed them and decides it’s safe. Because everyone over 65 already scores one CURB-65 point, adding confusion or a breathing rate of 30 or more reaches the score of 2 at which hospital care is usually suggested.
This article is for general information and is not a substitute for advice from a doctor. If you have symptoms or a health condition, please consult a qualified healthcare professional.
