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Table 2 Characteristics of inappropriate use of emergency service. Pelotas, Brazil, 2004

From: Demand for emergency health service: factors associated with inappropriate use

Variables N Prevalence (%) Crude PR (95% CI) P
Shift during which the ER visit took place     
Morning (7 am – 1 pm) 416 27.9 1.46 (1.02 – 2.10) 0.04
Afternoon (1 pm – 7 pm) 556 24.6 1.29 (0.90 – 1.85) 0.16
Night (7 pm – 1 am) 522 22.2 1.16 (0.81 – 1.68) 0.41
Daybreak (1 am – 7 am) 152 19.1 1.00  
Time taken from the onset of symptoms to arrival in the ER     <0.001*
<1 day 670 14.8 1.00  
1 – 10 days 777 30.2 2.04 (1.66 – 2.52)  
11 days or more 198 32.3 2.18 (1.66 – 2.87)  
Time in the waiting room     <0.001*
Up to 5 minutes 663 16.4 1.00  
6 – 15 minutes 486 26.5 1.61 (1.29 – 2.03)  
16 – 30 minutes 312 31.1 1.89 (1.49 – 2.40)  
31 minutes or more 178 33.7 2.05 (1.57 – 2.68)  
  1. PR: prevalence ratio, ER: Emergency Room, CI: confidence interval, * Test for linear trend