Without-DNR group versus DNR group before and after propensity-score matching
| Before matching | After matching | |||||
| Without-DNR n=455 (%) | DNR n=262 (%) | P value | Without-DNR n=239 (%) | DNR n=239 (%) | P value | |
| Age, years (median (IQR))* | 67 (57–77) | 71.5 (60–82) | <0.001 | 72 (62–79) | 70 (59–82) | 0.968 |
| Male sex, n (%) | 261 (57.4) | 164 (62.6) | 0.170 | 153 (64.0) | 144 (60.3) | 0.452 |
| With malignancy, n (%) | 86 (18.9) | 77 (29.4) | 0.001 | 64 (26.8) | 63 (26.4) | 1.000 |
| APACHE II (median (IQR)) | 20 (16–26) | 23 (19–29) | <0.001 | 22 (18–27) | 22 (18–29) | 0.904 |
| CCI (median (IQR)) | 4 (3–6) | 5 (4–6) | <0.001 | 5 (3–6) | 5 (4–6) | 0.983 |
| Advanced life support, n (%) | ||||||
| Intubation | 410 (90.1) | 238 (90.8) | 0.750 | 218 (91.2) | 216 (90.4) | 0.871 |
| Haemodialysis | 83 (18.2) | 59 (22.5) | 0.166 | 53 (22.2) | 56 (23.4) | 0.830 |
| Comorbidities, n (%) | ||||||
| Hypertension | 253 (55.6) | 153 (58.4) | 0.467 | 140 (58.6) | 137 (57.3) | 0.856 |
| Diabetes mellitus | 205 (45.1) | 115 (43.9) | 0.763 | 110 (46.0) | 107 (44.8) | 0.850 |
| Cerebrovascular accident | 91 (20.0) | 49 (18.7) | 0.673 | 46 (19.2) | 47 (19.7) | 1.000 |
| Coronary artery disease | 111 (24.4) | 71 (27.1) | 0.423 | 65 (27.2) | 65 (27.2) | 1.000 |
| COPD | 63 (13.8) | 40 (15.3) | 0.601 | 39 (16.3) | 37 (15.5) | 0.897 |
| Liver cirrhosis | 35 (7.7) | 25 (9.5) | 0.389 | 23 (9.6) | 20 (8.4) | 0.736 |
| End-stage renal disease | 46 (10.1) | 29 (11.1) | 0.686 | 25 (10.5) | 27 (11.3) | 0.885 |
*We used Mann-Whitney U test for non-normal data before matching, and we used Wilcoxon signed-rank test for hand non-normal data after matching
APACHE, Acute Physiological and Chronic Health Evaluation; CCI, Charlson Comorbidity Index; COPD, chronic obstructive pulmonary disease; DNR, do-not-resuscitate.