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Table 2 Accuracy of ESI-level assignment in four Swiss hospitals

From: Nurses’ accuracy and self-perceived ability using the Emergency Severity Index triage tool: a cross-sectional study in four Swiss hospitals

  Correct Triage No. (%) Undertriage No. (%) Overtriage No. (%) Chisqb df p-value
X 2 =
ESI Overall 1234 (59.6) 554 (26.8) 281 (13.6) 3.88 3 0.27
Hospital A 266 (63.3) 95 (22.6) 58 (13.8) a   
Hospital B 228 (58.5) 122 (31.3) 40 (10.3)    
Hospital C 557 (58.0) 243 (25.3) 160 (16.7)    
Hospital D 183 (61.0) 94 (31.3) 23 (7.7)    
ESI 1 Total 177 (42.8) 237 (57.2)   38.48 3 0.00
ESI 1 Hospital A 45 (53.6) 39 (46.4)     
ESI 1 Hospital B 11 (14.1) 67 (85.9)     
ESI 1 Hospital C 100 (52.1) 92 (47.9)     
ESI 1 Hospital D 21 (35.0) 39 (65.0)     
ESI 2 Total 198 (47.8) 208 (50.2) 7 (1.7) 2.11 3 0.55
ESI 2 Hospital A 39 (46.4) 44 (52.4) 0 (0.0) a   
ESI 2 Hospital B 42 (53.6) 36 (46.2) 0 (0.0)    
ESI 2 Hospital C 92 (47.9) 94 (49.0) 6 (3.1)    
ESI 2 Hospital D 25 (41.7) 34 (56.7) 1 (1.7)    
ESI 3 Total 351 (72.7) 61 (12.6) 71 (14.7) 4.92 3 0.18
ESI 3 Hospital A 77 (78.6) 9 (9.2) 12 (12.2)    
ESI 3 Hospital B 61 (67.0) 8 (8.8) 22 (24.2)    
ESI 3 Hospital C 158 (70.5) 36 (16.1) 30 (13.4)    
ESI 3 Hospital D 55 (78.6) 8 (11.4) 7 (10.0)    
ESI 4 Total 290 (70.0) 48 (11.6) 76 (18.4) 7.11 3 0.07
ESI 4 Hospital A 63 (75.0) 3 (3.6) 18 (21.4)    
ESI 4 Hospital B 62 (79.5) 11 (14.1) 5 (6.4)    
ESI 4 Hospital C 124 (64.6) 21 (10.9) 47 (24.5)    
ESI 4 Hospital D 41 (68.3) 13 (21.7) 6 (10.0)    
ESI 5 Total 218 (63.2)   127 (36.8) 24.61 3 0.00
ESI 5 Hospital a 42 (60.0)   28 (40.0)    
ESI 5 Hospital b 52 (80.0)   13 (20.0)    
ESI 5 Hospital c 83 (51.9)   77 (48.1)    
ESI 5 Hospital d 41 (82.0)   9 (18.0)    
  1. Nurses’ accuracy overall, per hospital, and stratified by ESI level when rating case scenarios provided in the ESI implementation handbook. ESI 1—lifesaving intervention required, ESI 2—high risk situation, or confused/lethargic/disoriented, or severe pain/distress, ESI 3 more than one resource needed but vital signs within predefined limits (no danger zone vitals), ESI 4—1 resource needed, ESI 5—no resource needed
  2. a One answer is missing
  3. bTest compared correct versus incorrect frequencies