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Table 1 Baseline characteristics of the capnographic monitoring and control groups

From: Clinical usefulness of capnographic monitoring when inserting a feeding tube in critically ill patients: retrospective cohort study

  Overall (n = 445) Capnographic monitoring group (n = 170) Control group (n = 275) P-value
Age (years) 67 (56–75) 68 (59–75.75) 64 (55–75) 0.221
Gender (male) 294 (66) 109 (64) 185 (67) 0.537
Major reasons for ICU admission
 Respiratory failure 209 (47) 81 (48) 128 (47) 0.002
 Cardiovascular 72 (16) 17 (10) 55 (20)
 Severe sepsis or septic shock 81 (18) 45 (26) 36 (13)
 Neurological 49 (11) 15 (9) 34 (12)
 Post-operation 17 (4) 4 (2) 13 (5)
 Multiple trauma 8 (2) 3 (2) 5 (2)
 Other 9 (2) 5 (3) 4 (1)
Use of mechanical ventilator 332 (75) 143 (84) 189 (69) <0.001
Artificial airway 366 (82) 151 (89) 215 (79) 0.004
 Endotracheal tube 242 (54) 103 (61) 139 (51)  
 Tracheal tube 124 (28) 48 (28) 76 (28)
Location
 MICU 165 (37) 62 (36) 103 (38) 0.031
 SICU 12 (3) 5 (3) 7 (3)
 CCU 46 (10) 10 (6) 36 (13)
 Cardiac SICU 11 (2) 2 (1) 9 (3)
 Oncology MICU 118 (27) 45 (26) 73 (27)
 Oncology SICU 93 (21) 46 (27) 47 (17)
GCS 13 (11–15) 14 (12–15) 13 (10–15) 0.005
RASS 0 (−2–1) 0 (−2–1) −1 (−2–1) 0.717
Delirium 203 (59) 86 (63) 117 (57) 0.216
Use of sedative drug 207 (47) 88 (52) 119 (43) 0.096
Respiratory complication 16 (4) 2 (1) 14 (5) 0.031
 Tracheal insertion 11 (3) 1 (1) 10 (4)
 Pneumothorax 5 (1) 1 (1) 4 (2)
  1. ICU intensive care unit, MICU medical intensive care unit, SICU surgical intensive care unit, CCU cardiac intensive care unit, GCS Glasgow Coma Scale, RASS Richmond Agitation Sedation Scale