Table 3 Demographics of the subgroups based on beta-blocker exposure prior to and after propensity score matching
Variable | Before matching | After matching | ||||
|---|---|---|---|---|---|---|
BB+ (n = 73) | BB– (n = 625) | p | BB+ (n = 73) | BB– (n = 73) | p | |
Age, mean [SD] years | 69.5 [14.1] | 43.2 [18.0] | < 0.001 | 69.5 [12.3] | 70.2 [14.6] | 0.628 |
Male sex, % (n) | 67.1 (49) | 80.8 (505) | 0.010 | 67.1 (49) | 68.5 (50) | 1.000 |
GCS > 8, % (n) | 91.8 (67) | 85.6 (535) | 0.204 | 91.8 (67) | 84.9 (62) | 0.302 |
SBP < 90 mmHg, % (n) | 12.3 (9) | 12.3 (77) | 1.000 | 12.3 (9) | 13.7 (10) | 1.000 |
Penetrating injury, % (n) | 6.8 (5) | 12.0 (75) | 0.266 | 6.8 (5) | 5.5 (4) | 1.000 |
ISS, mean [SD] | 23.7 [7.8] | 24.7 [10.9] | 0.482 | 23.7 [12.3] | 23.5 [9.8] | 0.894 |
ISS 16–24, % (n) | 64.4 (47) | 63.8 (399) | 1.000 | 64.4 (47) | 71.2 (52) | 0.442 |
ISS 25–49, % (n) | 32.9 (24) | 32.7 (201) | 1.000 | 32.9 (24) | 23.3 (17) | 0.210 |
ISS 50–74, % (n) | 2.7 (2) | 1.9 (12) | 0.650 | 2.7 (2) | 4.1 (3) | 1.000 |
CCI 0, % (n) | 8.2 (6) | 64.3 (401) | < 0.001 | 8.2 (6) | 4.1 (3) | 0.375 |
CCI 1, % (n) | 13.7 (10) | 14.9 (93) | 0.924 | 13.7 (10) | 15.1 (11) | 1.000 |
CCI 2, % (n) | 17.8 (13) | 8.0 (50) | 0.011 | 17.8 (13) | 19.2 (14) | 1.000 |
CCI 3, % (n) | 17.8 (13) | 4.8 (30) | < 0.001 | 17.8 (13) | 15.1 (11) | 0.791 |
CCI 4, % (n) | 15.1 (11) | 5.0 (31) | 0.002 | 15.1 (11) | 20.5 (15) | 0.503 |
CCI 5, % (n) | 12.3 (9) | 1.8 (11) | < 0.001 | 12.3 (9) | 15.1 (11) | 0.815 |
CCI 6, % (n) | 4.1 (3) | 0.6 (4) | 0.028 | 4.1 (3) | 5.5 (4) | 1.000 |
CCI 7, % (n) | 2.7 (2) | 0.5 (3) | 0.088 | 2.7 (2) | 2.7 (2) | 1.000 |
CCI 8, % (n) | 6.8 (5) | 0.2 (1) | < 0.001 | 6.8 (5) | 1.4 (1) | 0.125 |
CCI 9, % (n) | 1.4 (1) | 0 (0) | 0.105 | 6.8 (5) | 1.4 (1) | 0.125 |
Surgery required, % (n) | 61.6 (45) | 75.6 (471) | 0.015 | 53.4 (39) | 54.8 (40) | 1.000 |