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Table 3 Respiratory rate and arterial blood gases data available at arrival in the ED and the time a decision was made to admit or discharge to home.

From: The IRYSS-COPD appropriateness study: objectives, methodology, and description of the prospective cohort

  Without assumptions on missing data With assumptions on missing data
  Arrival at ED Decision time Arrival at ED Decision time
  N % missing n(%) N % missing n(%) N % missing n(%) N % missing n(%)
Respiratory Rate 2314 19.6   1536 46.6   2621 8.9   2200 23.5  
   <20    435 (18.80)    453 (29.49)    435 (16.60)    673 (30.59)
   20-24    832 (35.96)    713 (46.42)    1139 (43.46)    1084 (49.27)
   >24    1047 (45.25)    370 (24.09)    1047 (39.95)    443 (20.14)
pH 2494 13.3   747 74.0   2661 7.5   2410 16.2  
   >=7.35    2141 (85.85)    626 (83.80)    2308 (86.73)    2227 (92.41)
   7.26-7.35    293 (11.75)    105 (14.06)    293 (11.01)    160 (6.64)
   <7.26    60 (2.41)    16 (2.14)    60 (2.25)    23 (0.95)
PO2 2469 14.2   742 74.2   2642 8.17   2228 22.6  
   >60    1130 (45.77)    346 (46.63)    1303 (49.32)    1434 (64.36)
   45 - 60    979 (39.65)    316 (42.59)    979 (37.06)    668 (29.98)
   <=45    360 (14.58)    80 (10.78)    360 (13.63)    126 (5.66)
PCO2 2485 13.6   744 74.1   2485 13.6   1992 30.76  
   <=45    1365 (54.93)    313 (42.07)    1365 (54.93)    1106 (55.52)
   45-55    592 (23.82)    204 (27.42)    592 (23.82)    544 (27.31)
   55-65    288 (11.59)    118 (15.86)    288 (11.59)    184 (9.24)
   >65    240 (9.66)    109 (14.65)    240 (9.66)    158 (7.93)