Table 2

Follow-up all-cause health care resource utilisation and costs

Total0–1 Flares2 Flares3+ Flares
Resource utilisation(N=102 703)(N=89 201)(N=9714)(N=3788)
 Inpatient stay
  n14 26812 1061432730
  %13.913.614.7*19.3*
 ER visit
  n31 67026 43535551680
  %30.829.636.6*44.4*
 Ambulatory visits
  n102 00288 51197073784
  %99.399.299.9*99.9*
 Count of inpatient stays
  Mean0.200.200.22*0.29*
  SD0.620.600.670.75
 Count of ER visits
  Mean0.830.800.92*1.31*
  SD2.922.932.483.58
 Count of ambulatory visits
  Mean15.6515.1817.37*22.36*
  SD15.4915.3115.5017.81
Costs(N=102 703)(N=89 201)(N=9714)(N=3788)
 Total costs
  Mean11 97411 83912 10114 824 *
  SD30 34930 86626 95725 819
  Median4339423546256565
 Medical costs
  Mean975496 340989612 069*
  SD29 50130 05525 96324 319
  Median2356226226444022
 Inpatient costs
  Mean3832376440274918*
  SD19 39619 51318 75118 175
  Median0000
 ER costs
  Mean414394505*670*
  SD1542155014251627
  Median0000
 Ambulatory costs
  Mean4806478047095662*
  SD16 91717 51513 0719814
  Median1666160118722728
 Other medical costs
  Mean702702656819
  SD4575475229903576
  Median797783124
 Pharmacy costs
  Mean2220219922052756*
  SD3973384944185352
  Median1065104210981535

  • *p<0.001 vs 0–1 flares cohort; comparisons performed for means and percentages.

  • ER, emergency room.