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Table 1 Patient visit information by phase

From: Emergency department crowding and hospital transformation during COVID-19, a retrospective, descriptive study of a university hospital in Stockholm, Sweden

  Phase 1 Phase 2 Phase 3 Phase 4 Phase 5 Phase 6
Input
 Visits
  Visits, n 3546 1368 1482 410 613 1928
  Days, n 30 12 16 4 5 23
  Visits per day, n 118 114 93 103 123 84
 EMS arrival
  Arrivals per day, n 43 40 36 50 75 47
  Proportion, % 37% 35% 39% 49% 61% 56%
Throughput
 Imaging performed
  Yes, % 32% 29% 18% 15% 11% 19%
 Admitted to inpatient care
  Yes, % 33% 34% 43% 48% 51% 46%
Output
 Emergency ward
  Bed occupancy, % 90% 85% 66% 71% 79% 70%
  Care episodes per day, n 27 31 35 33 42 23
  Length of stay, hours 50 48 26 23 24 27
Demographics
 Sex
  Male sex, n (%) 1686 (48%) 677 (50%) 749 (51%) 213 (52%) 328 (54%) 1036 (54%)
 Age
   < 40, n (%) 975 (28%) 392 (29%) 416 (29%) 95 (24%) 138 (23%) 461 (24%)
  40–59, n (%) 897 (26%) 385 (29%) 439 (30%) 138 (35%) 206 (34%) 568 (30%)
  60–79, n (%) 1074 (31%) 398 (30%) 438 (30%) 119 (30%) 161 (27%) 598 (32%)
  80+, n (%) 515 (15%) 165 (12%) 158 (11%) 46 (12%) 96 (16%) 266 (14%)
  Missing, n 85 28 31 12 12 35
ED crowding
 ED LOS
  Mean, minutes 440 386 307 341 351 294
  Confidence interval, 95% 431–449 373–399 297–317 321–360 336–366 287–302
  1. Patient visit information for 9754 ED visit during 90 days from February 1 to April 30 in the Huddinge site of Karolinska University hospital. Variables are grouped in input, throughput and output factors, and by phase in the development
  2. EMS Emergency medical services (ambulance or helicopter), ED LOS Emergency department length of stay