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Table 2 Length of stay estimates with predictor variables for AFT and TC methods. Sample sizes differ due to the inclusion of censored observations in the AFT method

From: Hospital length of stay for COVID-19 patients: Data-driven methods for forward planning

    AFT model TC model
Trajectory Age Weeks Mean SD N Mean SD N
Hospital admission to outcome (no ICU) 1 to 49 12 to 14 4.9 4.8 146 5.1 6.5 146
   15 to 20 3.7 3.6 210 3.6 4.1 210
  50 to 64 12 to 14 7.3 7.2 223 7.0 7.4 223
   15 to 20 5.6 5.4 304 5.9 5.9 304
  65 to 74 12 to 14 10.6 10.4 204 11.0 10.5 204
   15 to 20 8.1 7.9 270 8.3 7.7 266
  75 + 12 to 14 11.7 11.4 609 11.7 10.9 607
   15 to 20 8.8 8.6 839 10.0 9.4 834
Hospital admission to outcome (via ICU) 1 to 49 12 to 14 17.5 12.5 312 17.5 11.8 312
   15 to 20 14.3 10.5 267 17.8 14.0 262
  50 to 64 12 to 14 18.8 13.4 641 19.5 14.3 626
   15 to 20 15.7 11.5 467 17.0 12.1 455
  65 to 74 12 to 14 16.8 12.0 391 17.1 13.5 388
   15 to 20 13.9 10.2 225 14.9 10.2 223
  75 + 12 to 14 13.3 9.5 161 12.6 10.8 161
   15 to 20 10.2 7.6 91 11.3 8.9 90
ICU entry to ICU exit 1 to 49 12 to 14 13.0 12.8 239 13.2 14.0 239
   15 to 20 10.0 10.0 210 12.7 14.5 210
  50 to 64 12 to 14 15.4 15.2 468 15.4 14.2 468
   15 to 20 12.0 12.0 337 13.6 13.8 337
  65 to 74 12 to 14 13.6 13.4 237 13.6 12.5 237
   15 to 20 10.4 10.4 152 11.4 11.4 152
  75 + 12 to 14 7.6 7.5 109 8.1 8.9 109
   15 to 20 5.5 5.6 57 5.0 5.9 57
Hospital admission to ICU entry 1 to 49 12 to 14 2.0 2.6 340 1.9 2.5 340
   15 to 20 1.7 2.3 336 1.8 2.4 336
  50 to 64 12 to 14 2.2 2.9 732 2.4 3.3 732
   15 to 20 2.0 2.7 610 1.8 2.2 610
  65 to 74 12 to 14 2.2 2.9 421 2.1 2.9 421
   15 to 20 1.9 2.6 276 1.9 2.4 276
  75 + 12 to 14 2.4 3.1 168 1.9 2.4 168
   15 to 20 2.1 2.8 100 2.6 3.2 100
  1. Source: own elaboration using CHESS data for England