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Table 3 Dispatcher performance

From: Description of call handling in emergency medical dispatch centres in Scandinavia: recognition of out-of-hospital cardiac arrests and dispatcher-assisted CPR

Group 1: No CPR prior to call (CPRduring) Copenhagen (N = 200) Stockholm (N = 200) Oslo (N = 200) p-value
 Consciousness addressed 168/200 (84) 189 /200 (95) 199/200 (100) p = 0.001
 Unknown 17/200 (9)
 Breathing addressed 169/200 (85) 196 /200 (98) 199/200 (100) p < 0.001
 Unknown 19/200 (10)
 Abnormal breathing addressed 68/200 (34) 13/200 (7) 195/200 (98) p < 0.001
 Unknown 15/200 (8) 1/200 (1)
 OHCA recognition 142/200 (71) 165/200 (83) 192/200 (96) p < 0.001
 Unknown 13/200 (7) 1/200 (1)
 CPR instructions started 99/200 (50) 120/200 (60) 160/200 (80) p < 0.001
 Unknown 24/200 (12)
  Dispatcher is assertive when providing CPR instructions 84/99 (85) 101/120 (84) 145/160 (91) p = 0.2
  Unknown 3/120 (3)
  Quality assessment 79/99 (80) 89/120 (74) 119/160 (74) p = 0.2
  Unknown 7/120 (6)
  Encouraging/motivating techniques in use 69/99 (70) 99/120 (83) 132/160 (83) p < 0.001
 Chest compressions performed 109/200 (55) 119/200 (60) 157/200 (79) p < 0.001
 Unknown 5/200 (3) 4/200 (2)
 Type of CPR     p = 0.3
  30:2 24/109 (22) 30/119 (25) 46/157 (29)  
  Compressions only 85/109 (78) 77/119 (65) 102/157 (65)  
  Unknown 20/119 (17) 9/157 (6)  
 BLS competence addressed 88/200 (44) 101/200 (51) 63/200 (32) p < 0.001
 Unknown 30/200 (15) 1/200 (1)
 AED addressed 22/200 (11) 8/200 (4) 6/200 (3) p < 0.001
 Unknown 51/200 (26)
 Call continued until EMS arrival 85/200 (43) 128/200 (64) 163/200 (82) p < 0.001
 Unknown 14/200 (7) 3/200 (2)
 Time intervals for recognition and CPR instructions
  Time to OHCA recognition (min:sec) 01:16 [IQR 00:50–02:11] 01:53 [IQR 1:01–3:13] 01:19 [IQR 0:50–2:09] p < 0.001
  Time to chest compression instructions (min) 02:10 [IQR 01:27–03:25] 03:20 [IQR 02:03–04:56] 02:24 [IQR 01:37–04:00] p < 0.001
  Time to chest compressions performed (min) 02:35 [IQR 01:45–03:05] 03:50 [IQR 02:30–05:27] 02:58 [IQR 02:09–04:36] p < 0.001
Group 2: CPR initiated prior to call (CPRprior) Copenhagen (N = 69) Stockholm (N = 9) Oslo (N = 38)  
 CPR instructions started 28/69 (41) 2/9 (22) 15/38 (40)  
 Unknown 8/69 (12)  
  Dispatcher is assertive when providing CPR instructions 24/28 (86) 2/2 (100) 15/15 (100)  
  Quality assessment 20/28 (71) 2/2 (100) 12/15 (80)  
  Encouraging/motivating techniques in use 20/28 (71) 2/2 (100) 14/15 (93)  
 Type of CPR
  30:2 17/69 (25) 1/9 (11) 7/38 (18)  
  Compressions only 30/69 (43) 1/9 (11) 12/38 (32)  
  Unknown 22/69 (32) 7/9 (78) 19/38 (50)  
 AED addressed 27/69 (39) 3/9 (33) 4/38 (11)  
 Call continued until EMS arrival 25/69 (36) 4/9 (44) 19/38 (50)  
  1. Categorical data are presented as numbers (percentages) and were analysed using Pearson chi-squared test. Continuous data are presented as medians (interquartile range) and compared with non-parametric Independent-Samples Kruskal-Wallis test