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Residual urine as a risk factor for lower urinary tract infection: a 1-year follow-up study in nursing homes
Ragnhild Omli1, Liv H Skotnes, Arnstein Mykletun
1Department of Medicine, Division of Geriatrics, Nord-Trøndelag HealthTrust, Namsos Hospital, Namsos, Norway.
Objectives:
To determine whether postvoid urine is a risk factor for the development of lower urinary tract infections (UTIs) in nursing home residents.
Design:
Prospective surveillance with a follow-up period of 1 year.
Setting:
Six Norwegian nursing homes.
Participants:
One hundred fifty nursing home residents.
Methods:
Postvoid residual (PVR) urine volumes were measured using a portable ultrasound. UTIs were registered prospectively for 1 year.
Results:
Ninety-eight residents (65.3%) had a PVR less than 100 mL, and 52 (34.7%) had a PVR of 100 mL or greater. During the follow-up period, 51 residents (34.0%) developed one or more UTIs. The prevalence of UTI in women was higher than in men (40.4% vs 19.6%; P=.02). There was no significant difference in mean PVR between residents who did and did not develop a UTI (79 vs 97 mL, P=.26). PVR of 100 mL or greater was not associated with greater risk of developing a UTI (P=.59).
Conclusion:
High PVR is common in nursing home residents. No association between PVR and UTI was found.
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