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Table 6 Length of stay in ED and analysis of factors affecting these variables.

From: Analysis of clinical and demographic characteristics of patients presenting with renal colic in the emergency department

   Length of stay in ED  
  n (%) <1 h n (%) 1–2 h n (%) >2 h n (%) P value
Sex      
Male 178 (75.7) 49 (27.5) 82 (46.0) 47 (26.4) 0.001
Female 57 (24.3) 7 (12.3) 19 (33.3) 31 (54.4)  
Age      
16–25 50 (21.2) 13 (26.0) 20 (40.0) 17 (34.0) 0.990
26–35 126 (53.6) 29 (23.0) 55 (43.6) 42 (33.3)  
>35 59 (25.2) 14 (23.7) 26 (44.0) 19 (32.2)  
RBC in urinalysis*      
>20 116 (49.4) 33 (28.4) 51 (44.0) 32 (27.6) 0.007
5–20 78 (33.2) 20 (25.6) 35 (44.9) 23 (29.5)  
<5 41 (17.4) 3 (7.3) 15 (36.6) 23 (56.1)  
WBC in urinalysis*      
>5 44 (18.7) 10 (22.7) 21 (47.7) 13 (29.5) 0.768
≤ 5 191 (81.3) 46 (24.1) 80 (41.9) 65 (34.0)  
Flank tenderness      
Yes 138 (58.7) 40 (29.0) 72 (52.1) 26 (18.8) 0.001
No/unknown 97 (41.3) 16 (16.5) 29 (29.9) 52 (53.6)  
Lower quadrant tenderness      
Yes 42 (17.9) 8 (19.0) 10 (23.8) 24 (57.1) 0.001
No 193 (82.1) 48 (24.9) 91 (47.1) 54 (28.0)  
  1. * HPF on a centrifuged specimen