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Table 3 Factors predictive for increased risk of developing UTI after age of 86 years onwards by multivariate Cox regression analysis and Population Attributable Risk (PAR) of the occurrence of UTI (n = 479)

From: Predictive factors of urinary tract infections among the oldest old in the general population. a population-based prospective follow-up study

  N HR (95%CI) PAR (%)
Functioning    
Severe cognitive impairment (MMSE < 19) 88 1.9 (1.3, 2.9) 19.6
Disability in daily living † 275 1.7 (1.1, 2.5) 43.8
Co-morbidities    
UTI between the ages of 85 and 86 years 68 3.4 (2.4, 5.0) 24.1
Self-reported urine incontinence 231 1.5 (1.0, 2.1) 33.0
  1. Variables in multivariate Cox regression model: gender, institutionalisation, education, severe cognitive impairment (MMSE < 19), disability in daily living, UTI between the ages of 85 and 86 years, stroke, unintentional loss of faeces, self-reported urine incontinence and medical diagnosis urine incontinence.
  2. CI = confidence interval; HR = hazard ratio; MMSE = Mini-Mental State Examination; UTI = urinary tract infection
  3. † Disability in daily living = unable to do any one of the nine basic activities of daily living independently, according to the Groningen Activity Restriction Scale.