Table 2

Results of multivariate logistic regression model to measure the effect of resistance on poor clinical outcomes after adjusting for significant risk factors.

Adjusted ORa (95% CI) >5 days versus 0–5 days
PoorlyPain or frequency‘Out of action’
Resistance to at least one antibiotic
 Resistant to antibiotic prescribed2.9 (1.8 to 4.7)3.4 (2.1 to 5.5)3.4 (2.0 to 5.8)
 Sensitive to antibiotic prescribed1.0 (0.7 to 1.4)1.1 (0.8 to 1.6)1.6 (1.0 to 2.3)
Resistance to ampicillinb
 Resistant to antibiotic prescribed3.4 (2.0 to 5.7)3.8 (2.3 to 6.4)3.6 (2.0 to 6.3)
 Sensitive to antibiotic prescribed1.1 (0.8 to 1.5)1.1 (0.8 to 1.6)1.5 (1.0 to 2.3)
Resistance to trimethoprimb
 Resistant to antibiotic prescribed2.8 (1.7 to 4.7)4.0 (2.4 to 6.9)3.6 (2.0 to 6.4)
 Sensitive to antibiotic prescribed1.3 (0.7 to 2.4)2.7 (1.5 to 5.1)3.0 (1.6 to 5.8)
  • a Adjusted for age, sex, comorbidity, previous bladder operation and previous catheterisation.

  • b Strains resistant to both trimethoprim and ampicillin were included in both analyses.