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Table 1 Calculated accuracy, sensitivity, specificity, positive and negative predictive value for significant bacteriuria compared to reference quantitative bacterial culture. Brachets is one-sided 95% confidence interval limits

From: The effect of urine storage temperature and boric acid preservation on quantitative bacterial culture for diagnosing canine urinary tract infection

Storage condition     Predictive value  
Time Method n Sensitivity Specificity Positive Negative Accuracy
24 h Non-preserved, COOL 169 0.98 0.94 0.96 0.97 97%
  (0.93–1.00) (0.86–0.98) (0.90–0.99) (0.90–1.00)  
UriSwab™, ROOM 169 0.97 0.98 0.99 0.96 98%
  (0.91–0.99) (0.92–1.00) (0.95–1.00) (0.87–0.99)  
48 h Non-preserved, COOL 177 0.97 0.95 0.97 0.96 96%
  (0.92–0.99) (0.88–0.99) (0.92–0.99) (0.88–0.99)  
UriSwab™, ROOM 177 0.93 0.97 0.98 0.89 94%
  (0.86–0.97) (0.89–1.00) (0.93–1.00) (0.79–0.95)  
  1. COOL Urine stored refrigerated, ROOM Urine stored in boric acid (UriSwab™) at room temperature
  2. Calculated accuracy, sensitivity, specificity, positive and negative predictive value for significant bacteriuria compared to reference quantitative bacterial culture. Brackets is one-sided 95% confidence interval limits