The goal of this cross-sectional, multicentric and descriptive epidemiological study is to assess the prevalence of chronic urinary retention (CUR) in elderly living in residential care for dependent elderly people in order to determine if there is an interest in offering them a bladder scan screening.

The main goal of this study is to assess the prevalence of CUR in elderly living in homes for the aged, the secondary ones are to evaluate the risk factors and complications of CUR.

We will carry out this prevalence study in 5 centres whit a draw of 40 residents per centre. Following an information and a non-opposition of the patients, we will collect datas in their medical file (age, medical history and comorbidities, current treatments, anticholinergic score according to the ADS (Anticholinergic Drug Scale), GIR score according to the AGGIR scale (Autonomie Gérontologique Groupes Iso Ressources), FAC modified score (Functional Ambulation Classification modified), MMSE score (Mini Mental State Examination), communicative capacity, notion of fall and date of last fall, knowledge of urinary incontinence, knowledge of constipation, knowledge of previous urinary screening by bladder scan and previous urological consulting, last urinalysis and its results, last analysis of creatinemia and creatinine clearance according to CKD-EPI) and we will perform up to 3 measurements of vesical volume by bladder scan.

The expected results are a prevalence of CUR between 10 and 20 % among people living in homes for the aged with more urinary tract infections, renal insufficiency and falls in the CUR group showing the interest of screening for CUR by bladder scan in elderly people living in nursing homes according to risk groups based on the risk factors found.

Inclusion Criteria:

• Adult people
• Residents in a participating nursing home

Exclusion Criteria:

• Resident with indwelling urinary catheter or regular urinary catheterisation
• Resident or legal representative opposing participation