Patients without missing data N = 747 | Patients with missing data N = 2130 | p value | |
---|---|---|---|
Age* | 72.54 (9.50) | 72.94 (9.51) | 0.3311 |
Clinical data previous to arrival at the ED | |||
Charlson Index | 0.5522 | ||
<=1 | 301 (40.68) | 883 (41.93) | |
>1 | 439 (59.32) | 1223 (58.07) | |
Number of hospital admissions in the previous 12 months for COPD | <.0001 | ||
3 or more | 128 (17.34) | 232 (11.04) | |
Less than 3 | 610 (82.66) | 1869 (88.96) | |
Basal FEV1% | <.0001 | ||
>= 50 | 169 (25.61) | 640 (36.16) | |
< 50 | 491 (74.39) | 1130 (63.84) | |
Use of oxygen at home - Yes | 336 (45.41) | 648 (30.84) | <.0001 |
At arrival at the ED | |||
Glasgow Coma Scale - altered | 34 (4.55) | 43 (2.02) | 0.0002 |
Edema - Yes | 153 (21.37) | 363 (18.19) | 0.0627 |
Dyspnea upon arrival in the ED - Yes | 546 (76.36) | 1288 (63.64) | <.0001 |
PH at arrival | <.0001 | ||
>=7.35 | 462 (69.79) | 1679 (91.65) | |
7.26-7.35 | 156 (23.56) | 137 (7.48) | |
<7.26 | 44 (6.65) | 16 (0.87) | |
PO2 at arrival | <.0001 | ||
>60 | 229 (35.12) | 901 (49.59) | |
45 - 60 | 273 (41.87) | 706 (38.86) | |
<=45 | 150 (23.01) | 210 (11.56) | |
Respiratory rate at arrival | <.0001 | ||
<20 | 79 (12.38) | 356 (21.24) | |
20-24 | 209 (32.76) | 623 (37.17) | |
>24 | 350 (54.86) | 697 (41.59) | |
PCO2 at arrival | <.0001 | ||
<=45 | 243 (36.82) | 1122 (61.48) | |
46-55 | 165 (25.00) | 427 (23.40) | |
56-65 | 117 (17.73) | 171 (9.37) | |
>65 | 135 (20.45) | 105 (5.75) | |
Outcome parameters | |||
Death | 18 (2.41) | 42 (1.97) | 0.4712 |
Admission to Intensive Care Unit | 14 (1.87) | 13 (0.61) | 0.0021 |
Invasive Mechanical Ventilation | 16 (2.14) | 22 (1.03) | 0.0223 |
Admission to Intermediate respiratory care unit | 50 (6.69) | 24 (1.13) | <.0001 |
Noninvasive mechanical ventilation | 57 (7.63) | 43 (2.02) | <.0001 |
Chronic oxygen therapy in the medical ward | 476 (63.72) | 1036 (48.64) | <.0001 |
Cardiac arrest | 6 (0.80) | 14 (0.66) | 0.6796 |