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Table 2 Performance of the triage SOP and modelled conventional care assessed via geocoding in patients with LVO and with LVO or ICHa

From: Effects of state-wide implementation of the Los Angeles Motor Scale for triage of stroke patients in clinical practice

  Triage SOP (n = 968) Modelled conventional careb (n = 968)
LVO, n/total n (%)
 Sensitivity 54/78 (69.2; 59.0–79.5) 14/78 (17.9; 9.4–26.5)
 Specificity 756/890 (84.9; 82.6–87.3) 890/890 (100; 100–100)
 Positive Predictive Value 54/188 (28.7; 22.3–35.2) 14/14 (100; 100–100)
 Negative Predictive Value 756/780 (96.9; 95.7–98.1) 890/954 (93.3; 91.7–94.9)
LVO or ICH, n/total n (%)
 Sensitivity 82/162 (50.6; 42.9–58.3) 38/162 (23.5; 16.9–30.0)
 Specificity 700/806 (86.8; 84.5–89.2) 806/806 (100; 100–100)
 Positive Predictive Value 82/188 (43.6; 36.5–50.7) 38/38 (100; 100–100)
 Negative Predictive Value 700/780 (89.7; 87.6–91.9) 806/930 (86.7; 84.5–88.9)
  1. SOP Standard operating procedure, LVO Large-vessel occlusion, ICH Intracranial haemorrhage
  2. a 60 of 1123 (5.3%) patients had no documented LAMS score, and 155 of 644 (24.1%) ischaemic stroke patients did not undergo vascular imaging; b Conventional care was the guideline-recommended transfer to the nearest stroke centre, as calculated via geocoding in each patient. CSCs served as PSCs if they were the nearest stroke centre
  3. 95% confidence intervals are reported in brackets