Types, diagnosis and management of incontinence in the elderly, including reversible causes

Continence needs four things: an intact lower urinary tract, adequate cognition, adequate mobility and dexterity, motivation, and an accessible environment. Failure of any one of these can produce incontinence in an older person.

Four basic causes of geriatric UI: lower urinary tract disease, neurological disease, functional/psychological factors, and environmental barriers — usually acting together.

Acute (transient) incontinence — abrupt onset with an acute illness or drug, remits when the cause is corrected. Persistent incontinence — long-standing, unrelated to acute illness.

Persistent types: stress, urge, overflow (incomplete emptying), functional — plus mixed, and DHIC as a difficult subgroup. Faecal incontinence coexists in 30–50% of nursing-home patients with frequent UI.

Mnemonic DRIP: Delirium · Restricted mobility and Retention · Infection, Inflammation, Impaction · Polyuria and Pharmaceuticals.

Delirium and acute illness — hospital-acquired incontinence is often preventable; manage with environmental change, scheduled toileting and toilet substitutes rather than a catheter.

Restricted mobility — new immobility, restraints, bed rails, unfamiliar ward, absent call bell, walking aid out of reach.

Retention with overflow — suspect in any patient with sudden-onset incontinence. Precipitated by immobility, anticholinergics, opioids and faecal impaction; may also signal acute spinal cord compression.

Infection and inflammation — acute cystitis, atrophic vaginitis, urethritis. Treating these can restore continence.

Faecal impaction — large impactions obstruct the bladder outlet in women and trigger involuntary contractions through rectal distension; disimpaction alone may cure the incontinence.

Polyuria — hyperglycaemia, hypercalcaemia, diuretics (especially rapid loop diuretics), excess fluid or caffeine, and volume-expanded states (heart failure, venous insufficiency) causing nocturnal polyuria.

Pharmaceuticals — memorise this list:

Diuretics → polyuria, urgency

Anticholinergics, tricyclics, antipsychotics → retention, overflow, impaction, sedation

Sedative-hypnotics → sedation, delirium, immobility

Opioids → retention, impaction, delirium

α-blockers → urethral relaxation (stress leak); α-agonists → retention

Cholinesterase inhibitors → frequency and urgency

ACE inhibitors → cough precipitating stress leak

Calcium-channel blockers, gabapentin, pregabalin, glitazones → oedema and nocturia

Alcohol and caffeine → polyuria, urgency, bladder irritation C. Diagnosis

Screen actively in every geriatric assessment — three direct questions about bladder trouble, involuntary loss, and pad use.

Basic evaluation: focused history + bladder record, targeted examination, urinalysis (± culture), and post-void residual. Blood glucose and calcium if there is unexplained polyuria.

Bladder diary for 3 days distinguishes nocturnal polyuria from a true storage problem and quantifies leaks.

Simple bedside urodynamics: observation of voiding, and the cough stress test — leak with cough while supine and the bladder relatively empty suggests intrinsic sphincter deficiency.

Selected further tests: urine culture and cytology, renal function, renal ultrasound, cystourethroscopy, and formal multichannel urodynamics (flowmetry, cystometrogram, pressure–flow, leak-point pressure, sphincter EMG, video urodynamics).

Follow the diagnostic algorithm: basic evaluation → reversible factors found? treat → indication for referral? refer → otherwise a therapeutic trial (behavioural ± drug for stress/ urge/mixed; behavioural + supportive for functional) → still incontinent and suitable? then further urological, gynaecological or urodynamic evaluation.

Treat reversible causes first, then match therapy to type: pelvic floor exercises ± α-agonist/topical oestrogen (stress); bladder training + antimuscarinic or β3-agonist (urge); relieve obstruction, intermittent catheterisation (overflow); scheduled/prompted voiding and environmental change (functional).

Faecal incontinence: commonest cause is faecal impaction with overflow soiling; also laxative abuse, neurological disease, sphincter damage, diarrhoeal and colorectal disease. Manage constipation with fibre 4–6 g/day, fluid, mobility, correct positioning, and use of the gastrocolic reflex after meals in an unhurried private setting. Avoid laxative overuse — it can cause an atonic "cathartic colon".

Anticholinergic burden is now a formal target. The AGS Beers Criteria 2023 keep oral oxybutynin and other non-selective antimuscarinics on the avoid-list for older adults; cumulative anticholinergic exposure is associated with incident dementia in large cohort studies, and deprescribing is an explicit part of incontinence care.

AUA/SUFU 2024 requires exclusion of reversible contributors and a documented PVR before advanced therapy in anyone with emptying symptoms, prior retention, enlarged prostate, neurological disease or long-standing diabetes.

SGLT-2 inhibitors are now a common and often-missed iatrogenic cause of new frequency, urgency, nocturia and genital infection in older diabetics — a modern addition to the "polyuria/pharmaceuticals" list not present in older drug tables.

WHO ICOPE (2nd edition, 2025) incorporates continence into intrinsic-capacity screening, positioning incontinence as a marker of declining capacity rather than an isolated urological symptom.

Indian context: LASI-based analyses (2023–24) link UI in older Indians to insomnia, sarcopenia, diabetes and indoor biomass smoke — all modifiable, and all reasons to look beyond the bladder in an Indian geriatric clinic.

Two mnemonics, two marks: write DRIP and DIAPPERS together — examiners reward both.

The three "must-not-miss" reversible causes: retention with overflow (may be cord compression), faecal impaction, and drug effect.

Numbers: fibre 4–6 g/day for constipation; 30–50% of nursing-home patients with frequent UI also have faecal incontinence; constipation = fewer than three bowel movements per week.

Answer structure tip: if the question says "including reversible causes", devote at least one-third of the answer to DRIP with the drug table — that is where the marks are. Examiner traps — (1) Do not present incontinence as purely urological; continence needs cognition, mobility, motivation and environment. (2) Do not miss retention as the cause of "new incontinence". (3) Do not use an indwelling catheter to manage hospital-acquired incontinence. (4) Do not treat asymptomatic bacteriuria in a stable institutionalised patient. (5) Do not omit faecal incontinence when the question says "incontinence in the elderly".

Continence = intact lower tract + cognition + mobility + motivation + accessible toilet.

Acute (transient) UI reverses with the cause; persistent UI does not.

DRIP and DIAPPERS cover every reversible cause worth naming.

Sudden new incontinence = exclude retention, and think spinal cord compression.

Faecal impaction can cause both urinary and faecal incontinence; disimpaction may cure both.

Basic work-up is history, examination, urinalysis, PVR — nothing more in most patients.

Beers 2023: avoid non-selective antimuscarinics in older adults.

SGLT-2 inhibitors are a modern iatrogenic cause of urgency and nocturia.